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All_Leetcode_Q_20190610


# 国内外目前OJ(Online Judge)平台 链接 公司采用(待完善)
1 Leetcode https://leetcode-cn.com/ https://leetcode.com/ FLAG?
2 hackerrank https://www.hackerrank.com/dashboard BCG、Akuna
3 Lintcode https://www.lintcode.com/ ?
4 牛客 https://www.nowcoder.com 拼多多、大疆、网易、腾讯
5 赛码 https://www.acmcoder.com/index 京东、美团
6 amcatglobal https://amcatglobal.aspiringminds.com/ 亚马逊

供参考的一些时间表：

# 标题 难度 Acceptance 频率 English Link 接受 提交 赞 踩
1 两数之和     简单 0.44 2.09 https://leetcode.com/problems/two-sum 1839799 4160810 10890 368
2 两数相加     中等 0.31 1.67 https://leetcode.com/problems/add-two-numbers 889091 2851363 5252 1353
3 无重复字符的最长子串     中等 0.28 1.85 https://leetcode.com/problems/longest-substring-without-repeating-characters 944953 3324704 5604 313
4 寻找两个有序数组的中位数     难 0.26 1.65 https://leetcode.com/problems/median-of-two-sorted-arrays 442060 1671600 4362 590
5 最长回文子串     中等 0.27 1.93 https://leetcode.com/problems/longest-palindromic-substring 566322 2070485 3660 354
6 Z 字形变换     中等 0.32 0.94 https://leetcode.com/problems/zigzag-conversion 322584 1008796 1044 3256
7 整数反转     简单 0.25 1.27 https://leetcode.com/problems/reverse-integer 702876 2775521 2192 3344
8 字符串转换整数 (atoi)     中等 0.14 1.05 https://leetcode.com/problems/string-to-integer-atoi 370221 2525416 950 6031
9 回文数     简单 0.43 1.18 https://leetcode.com/problems/palindrome-number 589770 1356568 1439 1304
10 正则表达式匹配     难 0.25 1.36 https://leetcode.com/problems/regular-expression-matching 307713 1215688 2644 516
11 盛最多水的容器     中等 0.44 1.24 https://leetcode.com/problems/container-with-most-water 378211 845066 3311 439
12 整数转罗马数字     中等 0.51 0.74 https://leetcode.com/problems/integer-to-roman 232849 456069 590 1863
13 罗马数字转整数     简单 0.52 0.75 https://leetcode.com/problems/roman-to-integer 422983 806224 1256 2658
14 最长公共前缀     简单 0.33 0.83 https://leetcode.com/problems/longest-common-prefix 472715 1407948 1378 1322
15 三数之和     中等 0.24 1.61 https://leetcode.com/problems/3sum 558572 2321019 3834 427
16 最接近的三数之和     中等 0.45 0.83 https://leetcode.com/problems/3sum-closest 350184 765119 1115 82
17 电话号码的字母组合     中等 0.41 0.61 https://leetcode.com/problems/letter-combinations-of-a-phone-number 394313 945668 2205 297
18 四数之和     中等 0.3 0.97 https://leetcode.com/problems/4sum
19 删除链表的倒数第N个节点     中等 0.34 0.96 https://leetcode.com/problems/remove-nth-node-from-end-of-list
20 有效的括号     简单 0.36 1.32 https://leetcode.com/problems/valid-parentheses 600931 1642960 2934 145
21 合并两个有序链表     简单 0.47 1.43 https://leetcode.com/problems/merge-two-sorted-lists 591500 1247176 2257 320
22 括号生成     中等 0.55 1.03 https://leetcode.com/problems/generate-parentheses 343615 623473 2794 172
23 合并K个排序链表     难 0.34 1.19 https://leetcode.com/problems/merge-k-sorted-lists 395129 1141058 2491 162
24 两两交换链表中的节点     中等 0.44 0.72 https://leetcode.com/problems/swap-nodes-in-pairs 318606 710541 1148 102
25 K 个一组翻转链表     难 0.36 1.59 https://leetcode.com/problems/reverse-nodes-in-k-group 186046 508786 1176 247
26 删除排序数组中的重复项     简单 0.4 0.67 https://leetcode.com/problems/remove-duplicates-from-sorted-array 599790 1469613 1525 3275
27 移除元素     简单 0.44 0.31 https://leetcode.com/problems/remove-element 416180 932365 833 1782
28 实现strStr()     简单 0.32 0.67 https://leetcode.com/problems/implement-strstr 433392 1350846 887 1309
29 两数相除     中等 0.16 0.36 https://leetcode.com/problems/divide-two-integers 197660 1223448 677 3213
30 串联所有单词的子串     难 0.23 0.57 https://leetcode.com/problems/substring-with-concatenation-of-all-words 134061 567133 520 891
31 下一个排列     中等 0.3 0.83 https://leetcode.com/problems/next-permutation 239912 786108 1782 557
32 最长有效括号     难 0.25 0.95 https://leetcode.com/problems/longest-valid-parentheses 192060 751524 1857 90
33 搜索旋转排序数组     中等 0.32 1.18 https://leetcode.com/problems/search-in-rotated-sorted-array 419943 1276069 2434 313
34 在排序数组中查找元素的第一个和最后一个位置     中等 0.33 0.52 https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array 304649 906177 1583 86
35 搜索插入位置     简单 0.4 0.3 https://leetcode.com/problems/search-insert-position 405923 992906 1327 177
36 有效的数独     中等 0.43 0.5 https://leetcode.com/problems/valid-sudoku 238282 551594 842 314
37 解数独     难 0.37 1.02 https://leetcode.com/problems/sudoku-solver 130216 350885 871 59
38 报数     简单 0.4 0.64 https://leetcode.com/problems/count-and-say 285740 703570 779 5979
39 组合总和     中等 0.48 0.78 https://leetcode.com/problems/combination-sum 346716 711774 2021 58
40 组合总和 II     中等 0.41 0.48 https://leetcode.com/problems/combination-sum-ii 223149 534412 836 45
41 缺失的第一个正数     难 0.28 1 https://leetcode.com/problems/first-missing-positive 215074 743158 1673 574
42 接雨水     难 0.43 1.74 https://leetcode.com/problems/trapping-rain-water 296767 685171 3615 66
43 字符串相乘     中等 0.3 1.17 https://leetcode.com/problems/multiply-strings 203117 660175 999 462
44 通配符匹配     难 0.22 0.83 https://leetcode.com/problems/wildcard-matching 177982 778669 1056 73
45 跳跃游戏 II     难 0.28 1.34 https://leetcode.com/problems/jump-game-ii 171326 609431 1174 60
46 全排列     中等 0.55 1.42 https://leetcode.com/problems/permutations 383728 692968 2031 59
47 全排列 II     中等 0.4 0.8 https://leetcode.com/problems/permutations-ii 245431 603968 1005 44
48 旋转图像     中等 0.48 0.88 https://leetcode.com/problems/rotate-image 254488 522690 1565 151
49 字母异位词分组     中等 0.47 0.51 https://leetcode.com/problems/group-anagrams 341014 726004 1657 109
50 Pow(x, n)     中等 0.28 0.62 https://leetcode.com/problems/powx-n 323710 1156069 855 2089
51 N皇后     难 0.39 1.18 https://leetcode.com/problems/n-queens 142692 361395 927 43
52 N皇后 II     难 0.52 0.32 https://leetcode.com/problems/n-queens-ii 100193 192224 272 114
53 最大子序和     简单 0.43 1.62 https://leetcode.com/problems/maximum-subarray 538231 1232388 4344 146
54 螺旋矩阵     中等 0.3 1.27 https://leetcode.com/problems/spiral-matrix 236597 774710 1085 412
55 跳跃游戏     中等 0.32 0.77 https://leetcode.com/problems/jump-game 267040 835405 1932 196
56 合并区间     中等 0.35 1.24 https://leetcode.com/problems/merge-intervals 352931 988545 2096 161
57 插入区间     难 0.31 0.98 https://leetcode.com/problems/insert-interval 178321 570455 825 101
58 最后一个单词的长度     简单 0.32 0.41 https://leetcode.com/problems/length-of-last-word 270304 837588 373 1563
59 螺旋矩阵 II     中等 0.46 1.13 https://leetcode.com/problems/spiral-matrix-ii 137313 293784 442 80
60 第k个排列     中等 0.33 0.38 https://leetcode.com/problems/permutation-sequence 138817 418558 832 223
61 旋转链表     中等 0.27 0.55 https://leetcode.com/problems/rotate-list 193910 712863 609 814
62 不同路径     中等 0.47 0.84 https://leetcode.com/problems/unique-paths 291580 611019 1579 109
63 不同路径 II     中等 0.33 0.62 https://leetcode.com/problems/unique-paths-ii 202512 604824 862 120
64 最小路径和     中等 0.47 0.64 https://leetcode.com/problems/minimum-path-sum 232807 495166 1363 39
65 有效数字     难 0.14 1.39 https://leetcode.com/problems/valid-number 124746 889486 430 3199
66 加一     简单 0.41 0.29 https://leetcode.com/problems/plus-one 396385 960132 870 1540
67 二进制求和     简单 0.39 0.57 https://leetcode.com/problems/add-binary 306137 779667 973 191
68 文本左右对齐     难 0.23 0.7 https://leetcode.com/problems/text-justification 97434 416955 357 1008
69 x 的平方根     简单 0.31 0.73 https://leetcode.com/problems/sqrtx 371336 1183154 767 1366
70 爬楼梯     简单 0.44 1.46 https://leetcode.com/problems/climbing-stairs 408843 923949 2208 80
71 简化路径     中等 0.28 0.89 https://leetcode.com/problems/simplify-path 151328 525012 429 1191
72 编辑距离     难 0.37 1.84 https://leetcode.com/problems/edit-distance 175645 463819 2089 30
73 矩阵置零     中等 0.39 0.44 https://leetcode.com/problems/set-matrix-zeroes 211023 528935 1056 192
74 搜索二维矩阵     中等 0.34 0.83 https://leetcode.com/problems/search-a-2d-matrix 225466 645864 834 98
75 颜色分类     中等 0.42 0.52 https://leetcode.com/problems/sort-colors 320969 759606 1637 156
76 最小覆盖子串     难 0.3 0.93 https://leetcode.com/problems/minimum-window-substring 239645 775739 2294 155
77 组合     中等 0.47 0.77 https://leetcode.com/problems/combinations 204223 427066 776 46
78 子集     中等 0.53 0.95 https://leetcode.com/problems/subsets 369736 697355 1936 50
79 单词搜索     中等 0.31 0.65 https://leetcode.com/problems/word-search 285661 910715 1764 86
80 删除排序数组中的重复项 II     中等 0.4 0.18 https://leetcode.com/problems/remove-duplicates-from-sorted-array-ii 202894 501829 654 537
81 搜索旋转排序数组 II     中等 0.32 0.57 https://leetcode.com/problems/search-in-rotated-sorted-array-ii 172641 529091 662 312
82 删除排序链表中的重复元素 II     中等 0.33 0.86 https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii 183457 553944 827 72
83 删除排序链表中的重复元素     简单 0.42 0.68 https://leetcode.com/problems/remove-duplicates-from-sorted-list 331045 776117 764 79
84 柱状图中最大的矩形     难 0.31 0.99 https://leetcode.com/problems/largest-rectangle-in-histogram 175924 563103 1889 53
85 最大矩形     难 0.33 1.45 https://leetcode.com/problems/maximal-rectangle 122394 366179 1439 51
86 分隔链表     中等 0.37 0.31 https://leetcode.com/problems/partition-list 164856 441521 661 180
87 扰乱字符串     难 0.31 0.87 https://leetcode.com/problems/scramble-string 90814 287052 281 479
88 合并两个有序数组     简单 0.35 1.12 https://leetcode.com/problems/merge-sorted-array 368427 1028721 1095 2777
89 格雷编码     中等 0.45 0.52 https://leetcode.com/problems/gray-code 134596 293597 378 1176
90 子集 II     中等 0.42 0.34 https://leetcode.com/problems/subsets-ii 204569 481131 876 50
91 解码方法     中等 0.22 0.66 https://leetcode.com/problems/decode-ways 262911 1175744 1394 1605
92 反转链表 II     中等 0.35 1.68 https://leetcode.com/problems/reverse-linked-list-ii 195888 559354 1204 88
93 复原IP地址     中等 0.31 1.55 https://leetcode.com/problems/restore-ip-addresses 140663 445710 669 268
94 二叉树的中序遍历     中等 0.56 0.91 https://leetcode.com/problems/binary-tree-inorder-traversal 466503 821139 1621 71
95 不同的二叉搜索树 II     中等 0.35 0.55 https://leetcode.com/problems/unique-binary-search-trees-ii 139561 389824 1232 113
96 不同的二叉搜索树     中等 0.46 0.71 https://leetcode.com/problems/unique-binary-search-trees 200968 433659 1710 68
97 交错字符串     难 0.28 0.51 https://leetcode.com/problems/interleaving-string 112206 399726 772 36
98 验证二叉搜索树     中等 0.25 0.54 https://leetcode.com/problems/validate-binary-search-tree 410204 1591329 1951 294
99 恢复二叉搜索树     难 0.34 0.17 https://leetcode.com/problems/recover-binary-search-tree 118624 341708 770 47
100 相同的树     简单 0.5 0.34 https://leetcode.com/problems/same-tree 380739 760291 1148 34
101 对称二叉树     简单 0.43 0.75 https://leetcode.com/problems/symmetric-tree 405899 932639 2237 46
102 二叉树的层次遍历     中等 0.48 0.88 https://leetcode.com/problems/binary-tree-level-order-traversal 381591 784712 1483 40
103 二叉树的锯齿形层次遍历     中等 0.41 0.58 https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal 221618 529396 953 59
104 二叉树的最大深度     简单 0.6 0.8 https://leetcode.com/problems/maximum-depth-of-binary-tree 514118 847498 1323 51
105 从前序与中序遍历序列构造二叉树     中等 0.41 0.97 https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal 225879 547042 1717 49
106 从中序与后序遍历序列构造二叉树     中等 0.39 0.31 https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal 154534 391884 858 18
107 二叉树的层次遍历 II     简单 0.46 0.47 https://leetcode.com/problems/binary-tree-level-order-traversal-ii 227803 485659 729 138
108 将有序数组转换为二叉搜索树     简单 0.5 0.48 https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree 264760 520164 1152 117
109 有序链表转换二叉搜索树     中等 0.41 0.51 https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree 177272 432892 1006 67
110 平衡二叉树     简单 0.41 0.58 https://leetcode.com/problems/balanced-binary-tree 323597 788282 1245 111
111 二叉树的最小深度     简单 0.35 0.4 https://leetcode.com/problems/minimum-depth-of-binary-tree 297249 841123 724 389
112 路径总和     简单 0.37 0.79 https://leetcode.com/problems/path-sum 316547 836310 943 306
113 路径总和 II     中等 0.4 0.36 https://leetcode.com/problems/path-sum-ii 233375 572390 889 33
114 二叉树展开为链表     中等 0.42 0.76 https://leetcode.com/problems/flatten-binary-tree-to-linked-list 239440 563124 1467 189
115 不同的子序列     难 0.35 0 https://leetcode.com/problems/distinct-subsequences 106874 304356 684 36
116 填充每个节点的下一个右侧节点指针     中等 0.38 0.17 https://leetcode.com/problems/populating-next-right-pointers-in-each-node 246478 648490 1012 86
117 填充每个节点的下一个右侧节点指针 II     中等 0.34 0.12 https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii 184464 535094 875 118
118 杨辉三角     简单 0.46 0.98 https://leetcode.com/problems/pascals-triangle 255901 554263 707 79
119 杨辉三角 II     简单 0.43 0.32 https://leetcode.com/problems/pascals-triangle-ii 205192 469511 476 166
120 三角形最小路径和     中等 0.39 0.51 https://leetcode.com/problems/triangle 182962 463721 1120 121
121 买卖股票的最佳时机     简单 0.47 1.14 https://leetcode.com/problems/best-time-to-buy-and-sell-stock 505415 1067673 2637 124
122 买卖股票的最佳时机 II     简单 0.52 0.65 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii 328055 630537 1000 1290
123 买卖股票的最佳时机 III     难 0.33 0.94 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii 150126 444767 1066 57
124 二叉树中的最大路径和     难 0.3 1.25 https://leetcode.com/problems/binary-tree-maximum-path-sum 194454 646103 1600 117
125 验证回文串     简单 0.31 0.64 https://leetcode.com/problems/valid-palindrome 359040 1150229 589 1727
126 单词接龙 II     难 0.17 0.97 https://leetcode.com/problems/word-ladder-ii
127 单词接龙     中等 0.24 0.38 https://leetcode.com/problems/word-ladder 260866 1080154 1443 801
128 最长连续序列     难 0.41 0.89 https://leetcode.com/problems/longest-consecutive-sequence 208987 500461 1845 89
129 求根到叶子节点数字之和     中等 0.42 0.56 https://leetcode.com/problems/sum-root-to-leaf-numbers 186234 437356 670 24
130 被围绕的区域     中等 0.22 0.7 https://leetcode.com/problems/surrounded-regions 146087 636760 751 426
131 分割回文串     中等 0.41 0.49 https://leetcode.com/problems/palindrome-partitioning 165022 402356 906 37
132 分割回文串 II     难 0.27 0.57 https://leetcode.com/problems/palindrome-partitioning-ii 103459 376588 575 23
133 克隆图     中等 0.26 0.54 https://leetcode.com/problems/clone-graph 218674 819726 784 840
134 加油站     中等 0.33 0.63 https://leetcode.com/problems/gas-station 144487 425971 749 294
135 分发糖果     难 0.28 1.99 https://leetcode.com/problems/candy 103036 362231 498 115
136 只出现一次的数字     简单 0.6 0.83 https://leetcode.com/problems/single-number 467518 775808 2462 93
137 只出现一次的数字 II     中等 0.46 0.69 https://leetcode.com/problems/single-number-ii 167411 363803 814 260
138 复制带随机指针的链表     中等 0.27 0.87 https://leetcode.com/problems/copy-list-with-random-pointer 249269 913960 1566 424
139 单词拆分     中等 0.35 0.53 https://leetcode.com/problems/word-break 340169 960364 2212 122
140 单词拆分 II     难 0.27 0.72 https://leetcode.com/problems/word-break-ii 159718 583599 929 241
141 环形链表     简单 0.37 0.79 https://leetcode.com/problems/linked-list-cycle 409161 1105058 1562 171
142 环形链表 II     中等 0.32 0.44 https://leetcode.com/problems/linked-list-cycle-ii 216705 673242 1428 105
143 重排链表     中等 0.31 0.92 https://leetcode.com/problems/reorder-list 155946 503693 877 65
144 二叉树的前序遍历     中等 0.51 0.73 https://leetcode.com/problems/binary-tree-preorder-traversal 341170 663093 772 39
145 二叉树的后序遍历     难 0.48 0.46 https://leetcode.com/problems/binary-tree-postorder-traversal 262277 539316 899 44
146 LRU缓存机制     中等 0.25 1.9 https://leetcode.com/problems/lru-cache 301470 1176622 2925 103
147 对链表进行插入排序     中等 0.37 0.77 https://leetcode.com/problems/insertion-sort-list 150245 402070 361 415
148 排序链表     中等 0.35 0.98 https://leetcode.com/problems/sort-list 186556 525403 1451 75
149 直线上最多的点数     难 0.15 1.49 https://leetcode.com/problems/max-points-on-a-line 120499 763156 470 1289
150 逆波兰表达式求值     中等 0.32 0.46 https://leetcode.com/problems/evaluate-reverse-polish-notation 163569 506273 517 348
151 翻转字符串里的单词     中等 0.16 0.73 https://leetcode.com/problems/reverse-words-in-a-string 282948 1681517 558 2266
152 乘积最大子序列     中等 0.29 0.72 https://leetcode.com/problems/maximum-product-subarray 212597 725173 2080 92
153 寻找旋转排序数组中的最小值     中等 0.43 0.75 https://leetcode.com/problems/find-minimum-in-rotated-sorted-array 285911 664899 976 161
154 寻找旋转排序数组中的最小值 II     难 0.39 0.61 https://leetcode.com/problems/find-minimum-in-rotated-sorted-array-ii 131151 333194 443 141
155 最小栈     简单 0.37 0.71 https://leetcode.com/problems/min-stack 304622 819452 1781 184
156 上下翻转二叉树     中等 0.5 0 https://leetcode.com/problems/binary-tree-upside-down 8
157 用 Read4 读取 N 个字符     简单 0.29 0 https://leetcode.com/problems/read-n-characters-given-read4 0
158 用 Read4 读取 N 个字符 II     难 0.26 0 https://leetcode.com/problems/read-n-characters-given-read4-ii-call-multiple-times 6
159 至多包含两个不同字符的最长子串     难 0.47 0.98 https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters 7
160 相交链表     简单 0.34 0.73 https://leetcode.com/problems/intersection-of-two-linked-lists 307236 903803 2106 180
161 相隔为 1 的编辑距离     中等 0.31 0 https://leetcode.com/problems/one-edit-distance 4
162 寻找峰值     中等 0.41 0.6 https://leetcode.com/problems/find-peak-element 240011 581446 827 1310
163 缺失的区间     中等 0.23 0 https://leetcode.com/problems/missing-ranges 4
164 最大间距     难 0.32 0.69 https://leetcode.com/problems/maximum-gap 70370 216048 486 126
165 比较版本号     中等 0.23 1.17 https://leetcode.com/problems/compare-version-numbers 137707 582511 288 1093
166 分数到小数     中等 0.19 0.36 https://leetcode.com/problems/fraction-to-recurring-decimal 88276 452855 451 1014
167 两数之和 II - 输入有序数组     简单 0.5 0.75 https://leetcode.com/problems/two-sum-ii-input-array-is-sorted 249776 495092 894 377
168 Excel表列名称     简单 0.29 0.57 https://leetcode.com/problems/excel-sheet-column-title 173159 596774 717 143
169 求众数     简单 0.52 0.75 https://leetcode.com/problems/majority-element 387300 734045 1663 145
170 两数之和 III - 数据结构设计     简单 0.3 0 https://leetcode.com/problems/two-sum-iii-data-structure-design 2
171 Excel表列序号     简单 0.51 0.31 https://leetcode.com/problems/excel-sheet-column-number 221301 428990 549 102
172 阶乘后的零     简单 0.37 0.46 https://leetcode.com/problems/factorial-trailing-zeroes
173 二叉搜索树迭代器     中等 0.48 0.25 https://leetcode.com/problems/binary-search-tree-iterator 206141 422642 1346 240
174 地下城游戏     难 0.27 1.02 https://leetcode.com/problems/dungeon-game 66375 244279 686 17
175 组合两个表     简单 0.52 1.63 https://leetcode.com/problems/combine-two-tables 164200 316036 652 93
176 第二高的薪水     简单 0.27 1.5 https://leetcode.com/problems/second-highest-salary/ 132926 487169 495 260
177 第N高的薪水     中等 0.26 1.04 https://leetcode.com/problems/nth-highest-salary 66141 250748 242 187
178 分数排名     中等 0.36 1.76 https://leetcode.com/problems/rank-scores 64464 175436 473 58
179 最大数     中等 0.25 1.23 https://leetcode.com/problems/largest-number 130260 504016 1010 137
180 连续出现的数字     中等 0.33 0.97 https://leetcode.com/problems/consecutive-numbers 54839 162517 237 66
181 超过经理收入的员工     简单 0.48 0.89 https://leetcode.com/problems/employees-earning-more-than-their-managers 111266 229097 357 40
182 查找重复的电子邮箱     简单 0.54 0.85 https://leetcode.com/problems/duplicate-emails 115785 211016 276 16
183 从不订购的客户     简单 0.45 0.56 https://leetcode.com/problems/customers-who-never-order 104708 232894 235 29
184 部门工资最高的员工     中等 0.29 1.78 https://leetcode.com/problems/department-highest-salary 64750 222997 283 71
185 部门工资前三高的员工     难 0.26 2.32 https://leetcode.com/problems/department-top-three-salaries 44117 169325 337 79
186 翻转字符串里的单词 II     中等 0.37 0 https://leetcode.com/problems/reverse-words-in-a-string-ii
187 重复的DNA序列     中等 0.36 0.8 https://leetcode.com/problems/repeated-dna-sequences 126395 350025 440 177
188 买卖股票的最佳时机 IV     难 0.26 0.8 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv 87539 331979 736 49
189 旋转数组     简单 0.3 0.43 https://leetcode.com/problems/rotate-array 301651 998440 1324 591
190 颠倒二进制位     简单 0.31 0.19 https://leetcode.com/problems/reverse-bits 182932 581809 559 179
191 位1的个数     简单 0.43 0.43 https://leetcode.com/problems/number-of-1-bits 259873 599914 433 383
192 统计词频     中等 0.26 2.07 https://leetcode.com/problems/word-frequency 18975 70788 132 72
193 有效电话号码     简单 0.25 1.58 https://leetcode.com/problems/valid-phone-numbers 24804 98678 93 219
194 转置文件     中等 0.22 1.81 https://leetcode.com/problems/transpose-file 9803 43003 47 131
195 第十行     简单 0.33 1.28 https://leetcode.com/problems/tenth-line 38645 114037 121 103
196 删除重复的电子邮箱     简单 0.33 1.24 https://leetcode.com/problems/delete-duplicate-emails 72723 220699 271 328
197 上升的温度     简单 0.34 0.76 https://leetcode.com/problems/rising-temperature 77853 223349 241 98
198 打家劫舍     简单 0.41 0.77 https://leetcode.com/problems/house-robber 323971 789317 2525 78
199 二叉树的右视图     中等 0.48 1.58 https://leetcode.com/problems/binary-tree-right-side-view 169626 352996 1051 45
200 岛屿数量     中等 0.41 1.18 https://leetcode.com/problems/number-of-islands 359570 863720 2616 94
201 数字范围按位与     中等 0.35 0.82 https://leetcode.com/problems/bitwise-and-of-numbers-range 82007 228126 404 57
202 快乐数     简单 0.45 0.74 https://leetcode.com/problems/happy-number 235488 519548 867 220
203 移除链表元素     简单 0.35 0.88 https://leetcode.com/problems/remove-linked-list-elements 227052 633633 834 50
204 计数质数     简单 0.29 0.95 https://leetcode.com/problems/count-primes 239109 822901 1056 399
205 同构字符串     简单 0.37 0.34 https://leetcode.com/problems/isomorphic-strings 205266 548622 754 213
206 反转链表     简单 0.54 1.91 https://leetcode.com/problems/reverse-linked-list 595945 1085353 2341 63
207 课程表     中等 0.37 0.34 https://leetcode.com/problems/course-schedule 219392 578104 1776 86
208 实现 Trie (前缀树)     中等 0.38 0.91 https://leetcode.com/problems/implement-trie-prefix-tree 180632 467385 1594 33
209 长度最小的子数组     中等 0.34 0.66 https://leetcode.com/problems/minimum-size-subarray-sum 178433 510799 1110 70
210 课程表 II     中等 0.34 0.15 https://leetcode.com/problems/course-schedule-ii 149240 427063 929 63
211 添加与搜索单词 - 数据结构设计     中等 0.3 0.25 https://leetcode.com/problems/add-and-search-word-data-structure-design 115718 380117 834 54
212 单词搜索 II     难 0.28 0.84 https://leetcode.com/problems/word-search-ii 113794 395524 1105 68
213 打家劫舍 II     中等 0.35 0.42 https://leetcode.com/problems/house-robber-ii 116613 330435 873 30
214 最短回文串     难 0.27 1.29 https://leetcode.com/problems/shortest-palindrome 75151 272079 638 78
215 数组中的第K个最大元素     中等 0.48 1.2 https://leetcode.com/problems/kth-largest-element-in-an-array 378568 789180 2029 168
216 组合总和 III     中等 0.51 0.14 https://leetcode.com/problems/combination-sum-iii 122657 237483 584 29
217 存在重复元素     简单 0.52 0.42 https://leetcode.com/problems/contains-duplicate 339136 651567 395 515
218 天际线问题     难 0.31 1.27 https://leetcode.com/problems/the-skyline-problem 93192 293847 1179 62
219 存在重复元素 II     简单 0.35 0.11 https://leetcode.com/problems/contains-duplicate-ii 199160 563486 489 605
220 存在重复元素 III     中等 0.19 0.3 https://leetcode.com/problems/contains-duplicate-iii 92862 470055 662 634
221 最大正方形     中等 0.33 1.07 https://leetcode.com/problems/maximal-square 131063 395918 1275 33
222 完全二叉树的节点个数     中等 0.33 0.76 https://leetcode.com/problems/count-complete-tree-nodes 122059 360642 962 132
223 矩形面积     中等 0.35 1.23 https://leetcode.com/problems/rectangle-area
224 基本计算器     难 0.32 1.43 https://leetcode.com/problems/basic-calculator 108113 329569 728 89
225 用队列实现栈     简单 0.39 0.92 https://leetcode.com/problems/implement-stack-using-queues 130230 330806 330 418
226 翻转二叉树     简单 0.58 1 https://leetcode.com/problems/invert-binary-tree 328740 563606 1723 28
227 基本计算器 II     中等 0.33 0.76 https://leetcode.com/problems/basic-calculator-ii 110563 329657 689 109
228 汇总区间     中等 0.36 0.44 https://leetcode.com/problems/summary-ranges 132059 366752 366 372
229 求众数 II     中等 0.32 0.6 https://leetcode.com/problems/majority-element-ii 101659 316167 851 103
230 二叉搜索树中第K小的元素     中等 0.51 0.58 https://leetcode.com/problems/kth-smallest-element-in-a-bst 225536 437014 1157 39
231 2的幂     简单 0.42 0.38 https://leetcode.com/problems/power-of-two 229786 547370 444 122
232 用栈实现队列     简单 0.43 0.98 https://leetcode.com/problems/implement-queue-using-stacks
233 数字 1 的个数     难 0.3 1.35 https://leetcode.com/problems/number-of-digit-one 41100 135959 173 442
234 回文链表     简单 0.36 0.8 https://leetcode.com/problems/palindrome-linked-list 262098 724868 1645 244
235 二叉搜索树的最近公共祖先     简单 0.44 0.76 https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree 284015 633770 1052 79
236 二叉树的最近公共祖先     中等 0.37 1.04 https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree 281559 751392 1927 135
237 删除链表中的节点     简单 0.53 0.5 https://leetcode.com/problems/delete-node-in-a-linked-list 287831 535873 737 3467
238 除自身以外数组的乘积     中等 0.55 0.22 https://leetcode.com/problems/product-of-array-except-self 260713 472610 2266 189
239 滑动窗口最大值     难 0.38 0.66 https://leetcode.com/problems/sliding-window-maximum 160235 418910 1680 100
240 搜索二维矩阵 II     中等 0.4 0.77 https://leetcode.com/problems/search-a-2d-matrix-ii 181760 444447 1508 43
241 为运算表达式设计优先级     中等 0.5 0.23 https://leetcode.com/problems/different-ways-to-add-parentheses 73859 147687 899 45
242 有效的字母异位词     简单 0.52 0.19 https://leetcode.com/problems/valid-anagram 343415 656874 712 106
243 最短单词距离     简单 0.57 0.71 https://leetcode.com/problems/shortest-word-distance
244 最短单词距离 II     中等 0.47 0 https://leetcode.com/problems/shortest-word-distance-ii 3
245 最短单词距离 III     中等 0.53 0 https://leetcode.com/problems/shortest-word-distance-iii
246 中心对称数     简单 0.42 0 https://leetcode.com/problems/strobogrammatic-number
247 中心对称数 II     中等 0.44 0 https://leetcode.com/problems/strobogrammatic-number-ii 2
248 中心对称数 III     难 0.36 0 https://leetcode.com/problems/strobogrammatic-number-iii 3
249 移位字符串分组     中等 0.48 0 https://leetcode.com/problems/group-shifted-strings 3
250 统计同值子树     中等 0.48 0 https://leetcode.com/problems/count-univalue-subtrees 3
251 展开二维向量     中等 0.43 0 https://leetcode.com/problems/flatten-2d-vector
252 会议室     简单 0.52 0 https://leetcode.com/problems/meeting-rooms 2
253 会议室 II     中等 0.42 0.7 https://leetcode.com/problems/meeting-rooms-ii 8
254 因子的组合     中等 0.44 0 https://leetcode.com/problems/factor-combinations 2
255 验证前序遍历序列二叉搜索树     中等 0.43 0 https://leetcode.com/problems/verify-preorder-sequence-in-binary-search-tree 5
256 粉刷房子     简单 0.49 0.75 https://leetcode.com/problems/paint-house 5
257 二叉树的所有路径     简单 0.46 0.33 https://leetcode.com/problems/binary-tree-paths 227984 494493 883 68
258 各位相加     简单 0.54 0.97 https://leetcode.com/problems/add-digits 239360 441927 455 790
259 较小的三数之和     中等 0.44 0 https://leetcode.com/problems/3sum-smaller
260 只出现一次的数字 III     中等 0.57 1.31 https://leetcode.com/problems/single-number-iii 107435 188169 847 76
261 以图判树     中等 0.39 0 https://leetcode.com/problems/graph-valid-tree 5
262 行程和用户     难 0.25 0.33 https://leetcode.com/problems/trips-and-users 33806 134434 199 155
263 丑数     简单 0.4 0.21 https://leetcode.com/problems/ugly-number 157908 388621 231 430
264 丑数 II     中等 0.36 0.49 https://leetcode.com/problems/ugly-number-ii 105097 288351 903 63
265 粉刷房子 II     难 0.41 0 https://leetcode.com/problems/paint-house-ii
266 回文排列     简单 0.6 0.89 https://leetcode.com/problems/palindrome-permutation 0
267 回文排列 II     中等 0.33 0 https://leetcode.com/problems/palindrome-permutation-ii 6
268 缺失数字     简单 0.48 0.36 https://leetcode.com/problems/missing-number
269 火星词典     难 0.31 0 https://leetcode.com/problems/alien-dictionary
270 最接近的二叉搜索树值     简单 0.43 0 https://leetcode.com/problems/closest-binary-search-tree-value 3
271 字符串的编码与解码     中等 0.26 0 https://leetcode.com/problems/encode-and-decode-strings 3
272 最接近的二叉搜索树值 II     难 0.45 0 https://leetcode.com/problems/closest-binary-search-tree-value-ii
273 整数转换英文表示     难 0.24 0.55 https://leetcode.com/problems/integer-to-english-words 104069 426844 534 1474
274 H指数     中等 0.34 0.22 https://leetcode.com/problems/h-index 123111 355625 393 674
275 H指数 II     中等 0.35 0.4 https://leetcode.com/problems/h-index-ii 80149 225940 204 367
276 栅栏涂色     简单 0.36 0.95 https://leetcode.com/problems/paint-fence
277 搜寻名人     中等 0.36 1.09 https://leetcode.com/problems/find-the-celebrity 7
278 第一个错误的版本     简单 0.3 0.32 https://leetcode.com/problems/first-bad-version 225063 748967 644 400
279 完全平方数     中等 0.42 0.49 https://leetcode.com/problems/perfect-squares 184569 439214 1451 117
280 摆动排序     中等 0.61 0 https://leetcode.com/problems/wiggle-sort 4
281 锯齿迭代器     中等 0.56 0 https://leetcode.com/problems/zigzag-iterator 3
282 给表达式添加运算符     难 0.32 1.31 https://leetcode.com/problems/expression-add-operators 68985 210318 689 95
283 移动零     简单 0.54 0.61 https://leetcode.com/problems/move-zeroes 470951 865800 2043 74
284 顶端迭代器     中等 0.4 0 https://leetcode.com/problems/peeking-iterator
285 二叉搜索树中的顺序后继     中等 0.34 0 https://leetcode.com/problems/inorder-successor-in-bst 2
286 墙与门     中等 0.49 0 https://leetcode.com/problems/walls-and-gates 5
287 寻找重复数     中等 0.49 0.76 https://leetcode.com/problems/find-the-duplicate-number 191477 385092 2476 273
288 单词的唯一缩写     中等 0.2 0 https://leetcode.com/problems/unique-word-abbreviation 1
289 生命游戏     中等 0.45 0 https://leetcode.com/problems/game-of-life 113975 250244 882 180
290 单词规律     简单 0.35 0.62 https://leetcode.com/problems/word-pattern 141647 404071 630 77
291 单词规律 II     难 0.4 0 https://leetcode.com/problems/word-pattern-ii
292 Nim 游戏     简单 0.55 1.01 https://leetcode.com/problems/nim-game 184705 331871 367 1146
293 翻转游戏     简单 0.58 0 https://leetcode.com/problems/flip-game 4
294 翻转游戏 II     中等 0.48 0 https://leetcode.com/problems/flip-game-ii 3
295 数据流的中位数     难 0.36 0.97 https://leetcode.com/problems/find-median-from-data-stream 109274 297395 1148 23
296 最佳的碰头地点     难 0.54 0 https://leetcode.com/problems/best-meeting-point 2
297 二叉树的序列化与反序列化     难 0.41 0.67 https://leetcode.com/problems/serialize-and-deserialize-binary-tree 185764 452648 1489 70
298 二叉树最长连续序列     中等 0.44 0 https://leetcode.com/problems/binary-tree-longest-consecutive-sequence 3
299 猜数字游戏     中等 0.39 0.75 https://leetcode.com/problems/bulls-and-cows 97374 246262 328 342
300 最长上升子序列     中等 0.4 1.15 https://leetcode.com/problems/longest-increasing-subsequence 224619 549735 2518 58
301 删除无效的括号     难 0.39 1.48 https://leetcode.com/problems/remove-invalid-parentheses 125815 319552 1386 59
302 包含全部黑色像素的最小矩形     难 0.49 0 https://leetcode.com/problems/smallest-rectangle-enclosing-black-pixels 2
303 区域和检索 - 数组不可变     简单 0.38 0.44 https://leetcode.com/problems/range-sum-query-immutable 139408 366039 456 761
304 二维区域和检索 - 矩阵不可变     中等 0.32 0 https://leetcode.com/problems/range-sum-query-2d-immutable 70032 216243 448 119
305 岛屿数量 II     难 0.41 0 https://leetcode.com/problems/number-of-islands-ii 3
306 累加数     中等 0.28 0.71 https://leetcode.com/problems/additive-number 40716 143584 200 297
307 区域和检索 - 数组可修改     中等 0.28 0.76 https://leetcode.com/problems/range-sum-query-mutable 72200 251042 696 59
308 二维区域和检索 - 可变     难 0.32 0 https://leetcode.com/problems/range-sum-query-2d-mutable 2
309 最佳买卖股票时机含冷冻期     中等 0.44 0.69 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown 91921 208519 1335 47
310 最小高度树     中等 0.3 0 https://leetcode.com/problems/minimum-height-trees 64974 215314 967 59
311 稀疏矩阵的乘法     中等 0.56 0 https://leetcode.com/problems/sparse-matrix-multiplication 6
312 戳气球     难 0.47 1.77 https://leetcode.com/problems/burst-balloons 64005 135188 1329 37
313 超级丑数     中等 0.41 0.93 https://leetcode.com/problems/super-ugly-number 60375 145691 356 93
314 二叉树的垂直遍历     中等 0.41 0 https://leetcode.com/problems/binary-tree-vertical-order-traversal 2
315 计算右侧小于当前元素的个数     难 0.38 0.49 https://leetcode.com/problems/count-of-smaller-numbers-after-self
316 去除重复字母     难 0.32 1.66 https://leetcode.com/problems/remove-duplicate-letters 57118 175459 725 78
317 离建筑物最近的距离     难 0.37 0 https://leetcode.com/problems/shortest-distance-from-all-buildings 3
318 最大单词长度乘积     中等 0.48 0 https://leetcode.com/problems/maximum-product-of-word-lengths 79817 164531 507 47
319 灯泡开关     中等 0.44 0.73 https://leetcode.com/problems/bulb-switcher 59577 135531 266 611
320 列举单词的全部缩写     中等 0.48 0 https://leetcode.com/problems/generalized-abbreviation 3
321 拼接最大数     难 0.25 0.64 https://leetcode.com/problems/create-maximum-number 30470 119909 389 145
322 零钱兑换     中等 0.3 1.33 https://leetcode.com/problems/coin-change 198733 651506 1765 76
323 无向图中连通分量的数目     中等 0.52 0 https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph 2
324 摆动排序 II     中等 0.28 0.91 https://leetcode.com/problems/wiggle-sort-ii 59799 213622 610 331
325 和等于 k 的最长子数组长度     中等 0.44 0 https://leetcode.com/problems/maximum-size-subarray-sum-equals-k 6
326 3的幂     简单 0.41 0.11 https://leetcode.com/problems/power-of-three 185390 444844 278 1023
327 区间和的个数     难 0.32 0.7 https://leetcode.com/problems/count-of-range-sum 31661 96599 379 56
328 奇偶链表     中等 0.49 0.74 https://leetcode.com/problems/odd-even-linked-list 148679 301741 745 221
329 矩阵中的最长递增路径     难 0.4 1.61 https://leetcode.com/problems/longest-increasing-path-in-a-matrix 88164 219955 984 18
330 按要求补齐数组     难 0.33 0.74 https://leetcode.com/problems/patching-array 31337 93916 314 56
331 验证二叉树的前序序列化     中等 0.38 0.41 https://leetcode.com/problems/verify-preorder-serialization-of-a-binary-tree 58416 151187 493 30
332 重新安排行程     中等 0.31 0.46 https://leetcode.com/problems/reconstruct-itinerary 79934 253540 733 486
333 最大 BST 子树     中等 0.33 0 https://leetcode.com/problems/largest-bst-subtree 4
334 递增的三元子序列     中等 0.39 0.12 https://leetcode.com/problems/increasing-triplet-subsequence 93183 235377 815 81
335 路径交叉     难 0.27 0 https://leetcode.com/problems/self-crossing 19232 71182 77 261
336 回文对     难 0.31 0 https://leetcode.com/problems/palindrome-pairs 70097 225957 775 101
337 打家劫舍 III     中等 0.48 0.64 https://leetcode.com/problems/house-robber-iii 103453 215013 1512 31
338 比特位计数     中等 0.64 0.13 https://leetcode.com/problems/counting-bits 169300 261403 1371 106
339 嵌套列表权重和     简单 0.68 0 https://leetcode.com/problems/nested-list-weight-sum 4
340 至多包含 K 个不同字符的最长子串     难 0.39 0 https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters
341 扁平化嵌套列表迭代器     中等 0.48 0.26 https://leetcode.com/problems/flatten-nested-list-iterator 111241 231723 948 388
342 4的幂     简单 0.4 0.36 https://leetcode.com/problems/power-of-four 114134 283302 315 142
343 整数拆分     中等 0.47 0.48 https://leetcode.com/problems/integer-break 79800 166852 572 166
344 反转字符串     简单 0.63 0.86 https://leetcode.com/problems/reverse-string 433199 683882 763 492
345 反转字符串中的元音字母     简单 0.41 0.41 https://leetcode.com/problems/reverse-vowels-of-a-string 156726 377412 387 705
346 数据流中的移动平均值     简单 0.66 0.56 https://leetcode.com/problems/moving-average-from-data-stream 3
347 前K个高频元素     中等 0.55 0.8 https://leetcode.com/problems/top-k-frequent-elements/ 207779 377562 1535 97
348 判定井字棋胜负     中等 0.49 0 https://leetcode.com/problems/design-tic-tac-toe 3
349 两个数组的交集     简单 0.54 0.67 https://leetcode.com/problems/intersection-of-two-arrays 222242 405575 400 803
350 两个数组的交集 II     简单 0.47 0.54 https://leetcode.com/problems/intersection-of-two-arrays-ii 203978 425859 692 242
351 安卓系统手势解锁     中等 0.45 0 https://leetcode.com/problems/android-unlock-patterns 8
352 将数据流变为多个不相交区间     难 0.43 0 https://leetcode.com/problems/data-stream-as-disjoint-intervals 24200 55586 181 53
353 贪吃蛇     中等 0.3 0 https://leetcode.com/problems/design-snake-game 2
354 俄罗斯套娃信封问题     难 0.34 0.75 https://leetcode.com/problems/russian-doll-envelopes 44871 132117 563 28
355 设计推特     中等 0.27 0 https://leetcode.com/problems/design-twitter 34584 126290 475 138
356 直线镜像     中等 0.3 0 https://leetcode.com/problems/line-reflection 2
357 计算各个位数不同的数字个数     中等 0.46 0.24 https://leetcode.com/problems/count-numbers-with-unique-digits 61878 131818 236 615
358 K 距离间隔重排字符串     难 0.32 0 https://leetcode.com/problems/rearrange-string-k-distance-apart 1
359 日志速率限制器     简单 0.65 1 https://leetcode.com/problems/logger-rate-limiter
360 有序转化数组     中等 0.46 0 https://leetcode.com/problems/sort-transformed-array
361 轰炸敌人     中等 0.43 1.31 https://leetcode.com/problems/bomb-enemy
362 敲击计数器     中等 0.59 0 https://leetcode.com/problems/design-hit-counter
363 矩形区域不超过 K 的最大数值和     难 0.35 0.83 https://leetcode.com/problems/max-sum-of-rectangle-no-larger-than-k
364 加权嵌套序列和 II     中等 0.57 0 https://leetcode.com/problems/nested-list-weight-sum-ii 5
365 水壶问题     中等 0.28 1.32 https://leetcode.com/problems/water-and-jug-problem 28014 96770 157 500
366 寻找完全二叉树的叶子节点     中等 0.65 0 https://leetcode.com/problems/find-leaves-of-binary-tree 5
367 有效的完全平方数     简单 0.39 0.24 https://leetcode.com/problems/valid-perfect-square 111359 279569 450 106
368 最大整除子集     中等 0.34 0.34 https://leetcode.com/problems/largest-divisible-subset 46642 133944 539 28
369 给单链表加一     中等 0.56 0 https://leetcode.com/problems/plus-one-linked-list 1
370 区间加法     中等 0.6 0 https://leetcode.com/problems/range-addition 3
371 两整数之和     简单 0.5 0.6 https://leetcode.com/problems/sum-of-two-integers 135304 265734 761 1339
372 超级次方     中等 0.35 1.03 https://leetcode.com/problems/super-pow 27728 77793 127 561
373 查找和最小的K对数字     中等 0.33 0 https://leetcode.com/problems/find-k-pairs-with-smallest-sums 66831 197410 685 56
374 猜数字大小     简单 0.39 0.46 https://leetcode.com/problems/guess-number-higher-or-lower 107929 273235 227 1150
375 猜数字大小 II     中等 0.37 0.4 https://leetcode.com/problems/guess-number-higher-or-lower-ii 44229 117237 507 718
376 摆动序列     中等 0.37 0.44 https://leetcode.com/problems/wiggle-subsequence 47972 128052 530 46
377 组合总和 Ⅳ     中等 0.43 0.21 https://leetcode.com/problems/combination-sum-iv 85584 195709 795 80
378 有序矩阵中第K小的元素     中等 0.49 0.7 https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix 110291 222718 1181 84
379 电话目录管理系统     中等 0.41 0 https://leetcode.com/problems/design-phone-directory 3
380 常数时间插入、删除和获取随机元素     中等 0.42 0.37 https://leetcode.com/problems/insert-delete-getrandom-o1 114884 268005 1113 88
381 O(1) 时间插入、删除和获取随机元素 - 允许重复     难 0.32 1.56 https://leetcode.com/problems/insert-delete-getrandom-o1-duplicates-allowed 42245 132080 424 44
382 链表随机节点     中等 0.49 1.6 https://leetcode.com/problems/linked-list-random-node 53054 107549 372 110
383 赎金信     简单 0.49 0.11 https://leetcode.com/problems/ransom-note 112717 225718 322 116
384 打乱数组     中等 0.5 0.82 https://leetcode.com/problems/shuffle-an-array 77360 154457 259 637
385 迷你语法分析器     中等 0.31 0.8 https://leetcode.com/problems/mini-parser
386 字典序排数     中等 0.46 1.41 https://leetcode.com/problems/lexicographical-numbers 40410 87449 363 58
387 字符串中的第一个唯一字符     简单 0.5 0.65 https://leetcode.com/problems/first-unique-character-in-a-string 271589 542081 999 78
388 文件的最长绝对路径     中等 0.39 0.88 https://leetcode.com/problems/longest-absolute-file-path 64685 164927 418 824
389 找不同     简单 0.53 0.26 https://leetcode.com/problems/find-the-difference 145679 274249 501 228
390 消除游戏     中等 0.43 0.55 https://leetcode.com/problems/elimination-game
391 完美矩形     难 0.28 0 https://leetcode.com/problems/perfect-rectangle 18400 65200 228 49
392 判断子序列     中等 0.46 0.33 https://leetcode.com/problems/is-subsequence 88841 189822 552 127
393 UTF-8 编码验证     中等 0.35 1.28 https://leetcode.com/problems/utf-8-validation 35522 98936 140 656
394 字符串解码     中等 0.45 1.6 https://leetcode.com/problems/decode-string 104762 232840 1484 84
395 至少有K个重复字符的最长子串     中等 0.38 0.81 https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters 47625 122981 728 63
396 旋转函数     中等 0.35 0.56 https://leetcode.com/problems/rotate-function 35067 99808 254 83
397 整数替换     中等 0.31 0.35 https://leetcode.com/problems/integer-replacement 40698 129419 210 235
398 随机数索引     中等 0.5 0.94 https://leetcode.com/problems/random-pick-index 55860 111611 264 457
399 除法求值     中等 0.47 0.38 https://leetcode.com/problems/evaluate-division 80659 169421 1297 104
400 第N个数字     简单 0.3 0.75 https://leetcode.com/problems/nth-digit 47842 157698 255 824
401 二进制手表     简单 0.45 0 https://leetcode.com/problems/binary-watch 64055 141295 369 617
402 移掉K位数字     中等 0.26 1.38 https://leetcode.com/problems/remove-k-digits 61156 229255 885 56
403 青蛙过河     难 0.36 1.44 https://leetcode.com/problems/frog-jump 51761 143068 507 60
404 左叶子之和     简单 0.49 0.09 https://leetcode.com/problems/sum-of-left-leaves 126877 258180 658 75
405 数字转换为十六进制数     简单 0.41 0 https://leetcode.com/problems/convert-a-number-to-hexadecimal 47710 113745 258 69
406 根据身高重建队列     中等 0.59 0.27 https://leetcode.com/problems/queue-reconstruction-by-height 79934 133470 1582 177
407 接雨水 II     难 0.39 1.8 https://leetcode.com/problems/trapping-rain-water-ii 27313 69475 684 18
408 有效单词缩写     简单 0.29 0 https://leetcode.com/problems/valid-word-abbreviation 1
409 最长回文串     简单 0.48 0.67 https://leetcode.com/problems/longest-palindrome 97782 203409 525 56
410 分割数组的最大值     难 0.42 1.65 https://leetcode.com/problems/split-array-largest-sum 42508 100071 721 40
411 最短特异单词缩写     难 0.35 0 https://leetcode.com/problems/minimum-unique-word-abbreviation 1
412 Fizz Buzz     简单 0.59 0.13 https://leetcode.com/problems/fizz-buzz 206192 346197 525 783
413 等差数列划分     中等 0.55 0.77 https://leetcode.com/problems/arithmetic-slices 63012 112777 591 115
414 第三大的数     简单 0.29 0.3 https://leetcode.com/problems/third-maximum-number 93202 321311 378 688
415 字符串相加     简单 0.43 1.5 https://leetcode.com/problems/add-strings 97443 222811 408 144
416 分割等和子集     中等 0.4 0.67 https://leetcode.com/problems/partition-equal-subset-sum 88070 216395 1232 35
417 太平洋大西洋水流问题     中等 0.37 0 https://leetcode.com/problems/pacific-atlantic-water-flow 44373 118317 671 102
418 屏幕可显示句子的数量     中等 0.31 0 https://leetcode.com/problems/sentence-screen-fitting 1
419 甲板上的战舰     中等 0.65 0.91 https://leetcode.com/problems/battleships-in-a-board 62679 95273 428 331
420 强密码检验器     难 0.17 2.46 https://leetcode.com/problems/strong-password-checker 6391 36863 85 361
421 数组中两个数的最大异或值     中等 0.51 1.36 https://leetcode.com/problems/maximum-xor-of-two-numbers-in-an-array 37237 72831 690 145
422 有效的单词方块     简单 0.36 0 https://leetcode.com/problems/valid-word-square 2
423 从英文中重建数字     中等 0.45 1.24 https://leetcode.com/problems/reconstruct-original-digits-from-english 19168 42017 119 424
424 替换后的最长重复字符     中等 0.44 0 https://leetcode.com/problems/longest-repeating-character-replacement 31511 71344 536 46
425 单词方块     难 0.44 0 https://leetcode.com/problems/word-squares 1
426 将二叉搜索树转化为排序的双向链表     中等 0.52 1.18 https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list 6
427 建立四叉树     简单 0.57 0 https://leetcode.com/problems/construct-quad-tree 11551 20278 126 304
428 序列化和反序列化 N 叉树     难 0.53 0 https://leetcode.com/problems/serialize-and-deserialize-n-ary-tree 1
429 N叉树的层序遍历     简单 0.59 0.42 https://leetcode.com/problems/n-ary-tree-level-order-traversal 33485 56210 242 31
430 扁平化多级双向链表     中等 0.42 0.31 https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list 23072 54429 348 55
431 将 N 叉树编码为二叉树     难 0.63 0 https://leetcode.com/problems/encode-n-ary-tree-to-binary-tree 1
432 全 O(1) 的数据结构     难 0.29 1.52 https://leetcode.com/problems/all-oone-data-structure 18456 62399 337 47
433 最小基因变化     中等 0.38 0.8 https://leetcode.com/problems/minimum-genetic-mutation 21582 56569 260 35
434 字符串中的单词数     简单 0.36 0.41 https://leetcode.com/problems/number-of-segments-in-a-string 56144 152065 142 560
435 无重叠区间     中等 0.41 0.6 https://leetcode.com/problems/non-overlapping-intervals 39147 94139 486 21
436 寻找右区间     中等 0.42 0.72 https://leetcode.com/problems/find-right-interval 26481 61832 209 97
437 路径总和 III     简单 0.42 0.35 https://leetcode.com/problems/path-sum-iii 106922 249422 1858 88
438 找到字符串中所有字母异位词     简单 0.37 0.42 https://leetcode.com/problems/find-all-anagrams-in-a-string 125285 335505 1591 123
439 三元表达式解析器     中等 0.53 0 https://leetcode.com/problems/ternary-expression-parser
440 字典序的第K小数字     难 0.26 2.13 https://leetcode.com/problems/k-th-smallest-in-lexicographical-order 8337 31361 170 31
441 排列硬币     简单 0.38 0.27 https://leetcode.com/problems/arranging-coins 70069 184454 196 461
442 数组中重复的数据     中等 0.61 1.21 https://leetcode.com/problems/find-all-duplicates-in-an-array 99127 162340 1080 114
443 压缩字符串     简单 0.37 1.18 https://leetcode.com/problems/string-compression 52977 140176 364 1126
444 序列重建     中等 0.2 0 https://leetcode.com/problems/sequence-reconstruction 2
445 两数相加 II     中等 0.5 1.13 https://leetcode.com/problems/add-two-numbers-ii 91874 183057 731 97
446 等差数列划分 II - 子序列     难 0.3 0 https://leetcode.com/problems/arithmetic-slices-ii-subsequence 14712 48719 265 40
447 回旋镖的数量     简单 0.49 0.6 https://leetcode.com/problems/number-of-boomerangs 54738 109646 296 447
448 找到所有数组中消失的数字     简单 0.53 0.46 https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array 154761 289471 1642 157
449 序列化和反序列化二叉搜索树     中等 0.47 0.69 https://leetcode.com/problems/serialize-and-deserialize-bst 59226 125271 629 46
450 删除二叉搜索树中的节点     中等 0.4 0.7 https://leetcode.com/problems/delete-node-in-a-bst 66724 166636 909 58
451 根据字符出现频率排序     中等 0.56 0.45 https://leetcode.com/problems/sort-characters-by-frequency 94724 168697 717 62
452 用最少数量的箭引爆气球     中等 0.46 0.97 https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons 38534 82919 487 25
453 最小移动次数使数组元素相等     简单 0.49 0.22 https://leetcode.com/problems/minimum-moves-to-equal-array-elements 57695 117298 368 588
454 四数相加 II     中等 0.5 0.5 https://leetcode.com/problems/4sum-ii 66721 131555 678 58
455 分发饼干     简单 0.48 0.57 https://leetcode.com/problems/assign-cookies 64096 132269 318 65
456 132模式     中等 0.27 0.92 https://leetcode.com/problems/132-pattern 28743 104988 639 39
457 环形数组循环     中等 0.27 0.82 https://leetcode.com/problems/circular-array-loop 18607 67322 149 922
458 可怜的小猪     难 0.45 1.8 https://leetcode.com/problems/poor-pigs 15574 34288 295 719
459 重复的子字符串     简单 0.4 0.82 https://leetcode.com/problems/repeated-substring-pattern 80697 201972 796 96
460 LFU缓存     难 0.28 2.15 https://leetcode.com/problems/lfu-cache 40133 138758 664 75
461 汉明距离     简单 0.7 0.21 https://leetcode.com/problems/hamming-distance 240377 341582 1305 115
462 最少移动次数使数组元素相等 II     中等 0.52 0.59 https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii 35053 66894 352 30
463 岛屿的周长     简单 0.61 0.93 https://leetcode.com/problems/island-perimeter 134955 221178 1088 81
464 我能赢吗     中等 0.27 1.1 https://leetcode.com/problems/can-i-win 36026 132219 612 103
465 最优账单平衡     难 0.42 0 https://leetcode.com/problems/optimal-account-balancing 5
466 统计重复个数     难 0.27 1.57 https://leetcode.com/problems/count-the-repetitions 7869 28763 103 80
467 环绕字符串中唯一的子字符串     中等 0.34 0.65 https://leetcode.com/problems/unique-substrings-in-wraparound-string 18421 54173 363 59
468 验证IP地址     中等 0.21 1.85 https://leetcode.com/problems/validate-ip-address 27732 130057 122 740
469 凸多边形     中等 0.35 0 https://leetcode.com/problems/convex-polygon 1
470 用 Rand7() 实现 Rand10()     中等 0.44 0.96 https://leetcode.com/problems/implement-rand10-using-rand7 9083 20219 188 74
471 编码最短长度的字符串     难 0.45 2.23 https://leetcode.com/problems/encode-string-with-shortest-length 1
472 连接词     难 0.34 0.87 https://leetcode.com/problems/concatenated-words 21624 62280 249 62
473 火柴拼正方形     中等 0.35 1 https://leetcode.com/problems/matchsticks-to-square 24653 68665 322 41
474 一和零     中等 0.39 0.55 https://leetcode.com/problems/ones-and-zeroes 31266 78637 566 135
475 供暖器     简单 0.31 1.25 https://leetcode.com/problems/heaters 48226 151488 488 509
476 数字的补数     简单 0.62 0.6 https://leetcode.com/problems/number-complement 107737 172709 549 73
477 汉明距离总和     中等 0.48 0.42 https://leetcode.com/problems/total-hamming-distance 47300 96630 525 37
478 在圆内随机生成点     中等 0.36 0.89 https://leetcode.com/problems/generate-random-point-in-a-circle 5295 14436 88 141
479 最大回文数乘积     难 0.27 1.23 https://leetcode.com/problems/largest-palindrome-product 14867 54227 72 1217
480 滑动窗口中位数     难 0.32 1.07 https://leetcode.com/problems/sliding-window-median
481 神奇字符串     中等 0.46 0 https://leetcode.com/problems/magical-string 18642 40362 82 536
482 密钥格式化     简单 0.4 0 https://leetcode.com/problems/license-key-formatting 80383 196283 291 490
483 最小好进制     难 0.34 1.79 https://leetcode.com/problems/smallest-good-base 9911 29000 88 246
484 寻找排列     中等 0.57 0 https://leetcode.com/problems/find-permutation 4
485 最大连续1的个数     简单 0.55 0.59 https://leetcode.com/problems/max-consecutive-ones 138523 251621 364 312
486 预测赢家     中等 0.46 1.07 https://leetcode.com/problems/predict-the-winner 50103 107118 977 66
487 最大连续1的个数 II     中等 0.46 0 https://leetcode.com/problems/max-consecutive-ones-ii
488 祖玛游戏     难 0.39 0 https://leetcode.com/problems/zuma-game 9848 25256 129 130
489 扫地机器人     难 0.64 0 https://leetcode.com/problems/robot-room-cleaner
490 迷宫     中等 0.47 0 https://leetcode.com/problems/the-maze 3
491 递增子序列     中等 0.42 0.75 https://leetcode.com/problems/increasing-subsequences 32376 76973 414 77
492 构造矩形     简单 0.48 0.49 https://leetcode.com/problems/construct-the-rectangle 45344 93068 133 202
493 翻转对     难 0.23 1.07 https://leetcode.com/problems/reverse-pairs 24566 106106 510 79
494 目标和     中等 0.45 0.21 https://leetcode.com/problems/target-sum 96835 213855 1392 66
495 提莫攻击     中等 0.52 0.3 https://leetcode.com/problems/teemo-attacking 36586 70000 244 507
496 下一个更大元素 I     简单 0.59 0.48 https://leetcode.com/problems/next-greater-element-i 97175 163009 793 1301
497 非重叠矩形中的随机点     中等 0.35 1.23 https://leetcode.com/problems/random-point-in-non-overlapping-rectangles 6620 18502 94 129
498 对角线遍历     中等 0.45 0.52 https://leetcode.com/problems/diagonal-traverse 43344 95530 354 227
499 迷宫 III     难 0.37 0 https://leetcode.com/problems/the-maze-iii
500 键盘行     简单 0.62 0.25 https://leetcode.com/problems/keyboard-row 88992 142947 397 497
501 二叉搜索树中的众数     简单 0.39 0.51 https://leetcode.com/problems/find-mode-in-binary-search-tree 56756 143459 554 217
502 IPO     难 0.37 0.88 https://leetcode.com/problems/ipo 11710 31050 197 19
503 下一个更大元素 II     中等 0.51 0.24 https://leetcode.com/problems/next-greater-element-ii 50866 99485 684 44
504 七进制数     简单 0.45 0.51 https://leetcode.com/problems/base-7 41667 92704 150 116
505 迷宫 II     中等 0.43 1.55 https://leetcode.com/problems/the-maze-ii 5
506 相对名次     简单 0.48 0.5 https://leetcode.com/problems/relative-ranks 42842 88589 190 374
507 完美数     简单 0.34 0.34 https://leetcode.com/problems/perfect-number 41218 120019 156 439
508 出现次数最多的子树元素和     中等 0.54 0.44 https://leetcode.com/problems/most-frequent-subtree-sum 49126 89956 390 74
509 斐波那契数     简单 0.66 1.03 https://leetcode.com/problems/fibonacci-number 59754 89521 178 140
510 二叉搜索树中的中序后继 II     中等 0.52 0 https://leetcode.com/problems/inorder-successor-in-bst-ii 2
513 找树左下角的值     中等 0.58 0.31 https://leetcode.com/problems/find-bottom-left-tree-value 72073 123267 571 94
514 自由之路     难 0.4 0.97 https://leetcode.com/problems/freedom-trail 13298 32755 277 18
515 在每个树行中找最大值     中等 0.57 0.29 https://leetcode.com/problems/find-largest-value-in-each-tree-row 64395 111341 492 44
516 最长回文子序列     中等 0.46 0.99 https://leetcode.com/problems/longest-palindromic-subsequence 60870 130069 886 127
517 超级洗衣机     难 0.37 0 https://leetcode.com/problems/super-washing-machines 12500 33824 195 109
518 零钱兑换 II     中等 0.42 0.89 https://leetcode.com/problems/coin-change-2 45251 105716 750 37
519 随机翻转矩阵     中等 0.33 1.25 https://leetcode.com/problems/random-flip-matrix 3860 11652 94 36
520 检测大写字母     简单 0.52 0.26 https://leetcode.com/problems/detect-capital 85124 162225 311 198
521 最长特殊序列 Ⅰ     简单 0.56 0.37 https://leetcode.com/problems/longest-uncommon-subsequence-i 46894 83124 205 3340
522 最长特殊序列 II     中等 0.32 0 https://leetcode.com/problems/longest-uncommon-subsequence-ii 16746 50927 103 474
523 连续的子数组和     中等 0.24 0.79 https://leetcode.com/problems/continuous-subarray-sum 66430 274813 685 873
524 通过删除字母匹配到字典里最长单词     中等 0.45 0.63 https://leetcode.com/problems/longest-word-in-dictionary-through-deleting 43624 95194 319 174
525 连续数组     中等 0.42 1.39 https://leetcode.com/problems/contiguous-array 39329 91980 680 35
526 优美的排列     中等 0.54 0.51 https://leetcode.com/problems/beautiful-arrangement 37472 68556 438 114
527 单词缩写     难 0.5 1.81 https://leetcode.com/problems/word-abbreviation 2
528 按权重随机选择     中等 0.42 1.42 https://leetcode.com/problems/random-pick-with-weight 27192 63546 256 462
529 扫雷游戏     中等 0.52 0 https://leetcode.com/problems/minesweeper 33197 62743 305 316
530 二叉搜索树的最小绝对差     简单 0.5 0.48 https://leetcode.com/problems/minimum-absolute-difference-in-bst 59870 118381 527 35
531 孤独像素 I     中等 0.57 0 https://leetcode.com/problems/lonely-pixel-i 1
532 数组中的K-diff数对     简单 0.29 0.38 https://leetcode.com/problems/k-diff-pairs-in-an-array 65047 217704 359 802
533 孤独像素 II     中等 0.46 0 https://leetcode.com/problems/lonely-pixel-ii 1
535 TinyURL 的加密与解密     中等 0.76 1.51 https://leetcode.com/problems/encode-and-decode-tinyurl 75312 98032 452 962
536 从字符串生成二叉树     中等 0.45 0 https://leetcode.com/problems/construct-binary-tree-from-string 3
537 复数乘法     中等 0.65 0 https://leetcode.com/problems/complex-number-multiplication 36564 55764 161 559
538 把二叉搜索树转换为累加树     简单 0.51 0.25 https://leetcode.com/problems/convert-bst-to-greater-tree 79488 155735 1271 84
539 最小时间差     中等 0.48 0.81 https://leetcode.com/problems/minimum-time-difference 28648 59727 239 85
540 有序数组中的单一元素     中等 0.57 0.49 https://leetcode.com/problems/single-element-in-a-sorted-array 54970 95641 737 59
541 反转字符串 II     简单 0.45 0.91 https://leetcode.com/problems/reverse-string-ii 60232 132181 247 748
542 01 矩阵     中等 0.35 0.88 https://leetcode.com/problems/01-matrix 43924 122812 669 78
543 二叉树的直径     简单 0.46 0.83 https://leetcode.com/problems/diameter-of-binary-tree 132986 284146 1412 85
544 输出比赛匹配对     中等 0.73 0 https://leetcode.com/problems/output-contest-matches 3
545 二叉树的边界     中等 0.35 0 https://leetcode.com/problems/boundary-of-binary-tree
546 移除盒子     难 0.38 1.1 https://leetcode.com/problems/remove-boxes 9437 24645 369 35
547 朋友圈     中等 0.53 0.9 https://leetcode.com/problems/friend-circles 87156 162189 1030 82
548 将数组分割成和相等的子数组     中等 0.43 1.69 https://leetcode.com/problems/split-array-with-equal-sum 1
549 二叉树中最长的连续序列     中等 0.44 0 https://leetcode.com/problems/binary-tree-longest-consecutive-sequence-ii 3
551 学生出勤记录 I     简单 0.45 0.17 https://leetcode.com/problems/student-attendance-record-i 51918 114635 148 595
552 学生出勤记录 II     难 0.33 1.6 https://leetcode.com/problems/student-attendance-record-ii 12639 38136 282 57
553 最优除法     中等 0.55 0 https://leetcode.com/problems/optimal-division 20501 36986 123 938
554 砖墙     中等 0.47 0.59 https://leetcode.com/problems/brick-wall 37968 79613 571 28
555 分割连接字符串     中等 0.39 0 https://leetcode.com/problems/split-concatenated-strings 1
556 下一个更大元素 III     中等 0.3 1.59 https://leetcode.com/problems/next-greater-element-iii 26079 86914 354 116
557 反转字符串中的单词 III     简单 0.64 0.96 https://leetcode.com/problems/reverse-words-in-a-string-iii 127129 197964 624 66
558 四叉树交集     简单 0.41 1.55 https://leetcode.com/problems/quad-tree-intersection 4590 11138 43 203
559 N叉树的最大深度     简单 0.65 0.57 https://leetcode.com/problems/maximum-depth-of-n-ary-tree 48047 73380 352 20
560 和为K的子数组     中等 0.42 0.94 https://leetcode.com/problems/subarray-sum-equals-k 105939 250902 1984 52
561 数组拆分 I     简单 0.69 0.33 https://leetcode.com/problems/array-partition-i 145793 210945 568 1708
562 矩阵中最长的连续1线段     中等 0.43 0 https://leetcode.com/problems/longest-line-of-consecutive-one-in-matrix 2
563 二叉树的坡度     简单 0.47 0 https://leetcode.com/problems/binary-tree-tilt 52098 110813 328 739
564 寻找最近的回文数     难 0.18 1.8 https://leetcode.com/problems/find-the-closest-palindrome 13843 73789 145 584
565 数组嵌套     中等 0.52 0 https://leetcode.com/problems/array-nesting 35461 67386 553 78
566 重塑矩阵     简单 0.58 0.15 https://leetcode.com/problems/reshape-the-matrix 78012 132364 563 85
567 字符串的排列     中等 0.38 0.41 https://leetcode.com/problems/permutation-in-string 47625 123886 634 34
568 最大休假天数     难 0.38 0 https://leetcode.com/problems/maximum-vacation-days
569 员工薪水中位数     难 0.47 0 https://leetcode.com/problems/median-employee-salary 0
570 至少有5名直接下属的经理     中等 0.62 0 https://leetcode.com/problems/managers-with-at-least-5-direct-reports 0
571 给定数字的频率查询中位数     难 0.47 0 https://leetcode.com/problems/find-median-given-frequency-of-numbers 0
572 另一个树的子树     简单 0.41 0.45 https://leetcode.com/problems/subtree-of-another-tree 101894 244076 1195 44
573 松鼠模拟     中等 0.53 0 https://leetcode.com/problems/squirrel-simulation 2
574 当选者     中等 0.36 0 https://leetcode.com/problems/winning-candidate
575 分糖果     简单 0.59 0 https://leetcode.com/problems/distribute-candies 72505 121473 292 665
576 出界的路径数     中等 0.32 0 https://leetcode.com/problems/out-of-boundary-paths 17560 54668 293 108
577 员工奖金     简单 0.59 0 https://leetcode.com/problems/employee-bonus
578 查询回答率最高的问题     中等 0.35 0 https://leetcode.com/problems/get-highest-answer-rate-question 0
579 查询员工的累计薪水     难 0.34 1.21 https://leetcode.com/problems/find-cumulative-salary-of-an-employee 0
580 统计各专业学生人数     中等 0.42 0 https://leetcode.com/problems/count-student-number-in-departments
581 最短无序连续子数组     简单 0.3 0.43 https://leetcode.com/problems/shortest-unsorted-continuous-subarray 67983 226133 1431 70
582 杀死进程     中等 0.56 0 https://leetcode.com/problems/kill-process 5
583 两个字符串的删除操作     中等 0.45 1.14 https://leetcode.com/problems/delete-operation-for-two-strings 31251 69472 691 18
584 寻找用户推荐人     简单 0.67 0 https://leetcode.com/problems/find-customer-referee 0
585 2016年的投资     中等 0.47 0 https://leetcode.com/problems/investments-in-2016 5
586 订单最多的客户     简单 0.66 0 https://leetcode.com/problems/customer-placing-the-largest-number-of-orders 2
587 安装栅栏     难 0.34 0 https://leetcode.com/problems/erect-the-fence 6929 20188 135 146
588 设计内存文件系统     难 0.39 0 https://leetcode.com/problems/design-in-memory-file-system 2
589 N叉树的前序遍历     简单 0.67 0.78 https://leetcode.com/problems/n-ary-tree-preorder-traversal 43620 64545 224 35
590 N叉树的后序遍历     简单 0.67 0.24 https://leetcode.com/problems/n-ary-tree-postorder-traversal 39770 58829 284 37
591 标签验证器     难 0.32 0 https://leetcode.com/problems/tag-validator 5219 15913 57 287
592 分数加减运算     中等 0.47 0 https://leetcode.com/problems/fraction-addition-and-subtraction 13066 27758 117 232
593 有效的正方形     中等 0.4 0.57 https://leetcode.com/problems/valid-square 19598 48318 134 265
594 最长和谐子序列     简单 0.43 0.6 https://leetcode.com/problems/longest-harmonious-subsequence 36704 83749 413 56
595 大的国家     简单 0.73 0.59 https://leetcode.com/problems/big-countries 111801 151423 366 519
596 超过5名学生的课     简单 0.35 0.78 https://leetcode.com/problems/classes-more-than-5-students 45421 127305 150 423
597 好友申请 I ：总体通过率     简单 0.39 0 https://leetcode.com/problems/friend-requests-i-overall-acceptance-rate 3
598 范围求和 II     简单 0.48 0 https://leetcode.com/problems/range-addition-ii 31143 63916 189 467
599 两个列表的最小索引总和     简单 0.48 0 https://leetcode.com/problems/minimum-index-sum-of-two-lists 57455 119699 359 144
600 不含连续1的非负整数     难 0.32 1.38 https://leetcode.com/problems/non-negative-integers-without-consecutive-ones 8668 26472 228 63
601 体育馆的人流量     难 0.36 1.61 https://leetcode.com/problems/human-traffic-of-stadium 14370 39270 87 185
602 好友申请 II ：谁有最多的好友     中等 0.45 0 https://leetcode.com/problems/friend-requests-ii-who-has-the-most-friends 0
603 连续空余座位     简单 0.58 0 https://leetcode.com/problems/consecutive-available-seats 2
604 迭代压缩字符串     简单 0.34 0 https://leetcode.com/problems/design-compressed-string-iterator 2
605 种花问题     简单 0.3 0.71 https://leetcode.com/problems/can-place-flowers 61675 199422 464 265
606 根据二叉树创建字符串     简单 0.51 0.76 https://leetcode.com/problems/construct-string-from-binary-tree 59128 114605 528 731
607 销售员     简单 0.57 0 https://leetcode.com/problems/sales-person 0
608 树节点     中等 0.58 0 https://leetcode.com/problems/tree-node 2
609 在系统中查找重复文件     中等 0.55 0 https://leetcode.com/problems/find-duplicate-file-in-system 27365 49570 228 387
610 判断三角形     简单 0.61 0 https://leetcode.com/problems/triangle-judgement 0
611 有效三角形的个数     中等 0.45 0.76 https://leetcode.com/problems/valid-triangle-number 37483 82842 573 71
612 平面上的最近距离     中等 0.53 0 https://leetcode.com/problems/shortest-distance-in-a-plane
613 直线上的最近距离     简单 0.73 0 https://leetcode.com/problems/shortest-distance-in-a-line 1
614 二级关注者     中等 0.22 0 https://leetcode.com/problems/second-degree-follower
615 平均工资：部门与公司比较     难 0.37 0 https://leetcode.com/problems/average-salary-departments-vs-company
616 给字符串添加加粗标签     中等 0.39 0 https://leetcode.com/problems/add-bold-tag-in-string 6
617 合并二叉树     简单 0.7 0.33 https://leetcode.com/problems/merge-two-binary-trees 178367 253955 1823 129
618 学生地理信息报告     难 0.42 0 https://leetcode.com/problems/students-report-by-geography 0
619 只出现一次的最大数字     简单 0.38 0 https://leetcode.com/problems/biggest-single-number
620 有趣的电影     简单 0.62 0.28 https://leetcode.com/problems/not-boring-movies 63932 102579 179 210
621 任务调度器     中等 0.45 0.96 https://leetcode.com/problems/task-scheduler 87310 191885 1642 278
622 设计循环队列     中等 0.39 0.58 https://leetcode.com/problems/design-circular-queue 26283 66843 236 47
623 在二叉树中增加一行     中等 0.47 0 https://leetcode.com/problems/add-one-row-to-tree 26430 55853 280 102
624 数组列表中的最大距离     简单 0.37 0 https://leetcode.com/problems/maximum-distance-in-arrays
625 最小因式分解     中等 0.31 0 https://leetcode.com/problems/minimum-factorization 3
626 换座位     中等 0.54 1.14 https://leetcode.com/problems/exchange-seats 24899 45569 172 171
627 交换工资     简单 0.68 0.61 https://leetcode.com/problems/swap-salary 66574 96678 306 229
628 三个数的最大乘积     简单 0.46 0.88 https://leetcode.com/problems/maximum-product-of-three-numbers 70863 153933 673 258
629 K个逆序对数组     难 0.29 1.48 https://leetcode.com/problems/k-inverse-pairs-array 7853 26812 207 70
630 课程表 III     难 0.31 0.84 https://leetcode.com/problems/course-schedule-iii 11614 36716 395 25
631 设计 Excel 求和公式     难 0.29 0 https://leetcode.com/problems/design-excel-sum-formula 2
632 最小区间     难 0.47 1.02 https://leetcode.com/problems/smallest-range 23239 48943 672 20
633 平方数之和     简单 0.32 0.45 https://leetcode.com/problems/sum-of-square-numbers 44509 136075 337 225
634 寻找数组的错位排列     中等 0.37 0 https://leetcode.com/problems/find-the-derangement-of-an-array 2
635 设计日志存储系统     中等 0.54 0 https://leetcode.com/problems/design-log-storage-system 5
636 函数的独占时间     中等 0.48 0 https://leetcode.com/problems/exclusive-time-of-functions 40311 82831 433 719
637 二叉树的层平均值     简单 0.58 0.73 https://leetcode.com/problems/average-of-levels-in-binary-tree 79533 135254 805 128
638 大礼包     中等 0.48 0 https://leetcode.com/problems/shopping-offers 21297 43706 366 332
639 解码方法 2     难 0.25 0 https://leetcode.com/problems/decode-ways-ii 21684 86219 267 363
640 求解方程     中等 0.4 0 https://leetcode.com/problems/solve-the-equation
641 设计循环双端队列     中等 0.49 0 https://leetcode.com/problems/design-circular-deque 6816 13798 103 29
642 设计搜索自动补全系统     难 0.37 0 https://leetcode.com/problems/design-search-autocomplete-system 3
643 子数组最大平均数 I     简单 0.39 0.69 https://leetcode.com/problems/maximum-average-subarray-i 52014 131432 460 84
644 最大平均子段和 II     难 0.28 0 https://leetcode.com/problems/maximum-average-subarray-ii 4
645 错误的集合     简单 0.4 0 https://leetcode.com/problems/set-mismatch 47931 117644 416 231
646 最长数对链     中等 0.48 0.35 https://leetcode.com/problems/maximum-length-of-pair-chain 36470 74717 565 52
647 回文子串     中等 0.57 0.58 https://leetcode.com/problems/palindromic-substrings 99901 175168 1369 73
648 单词替换     中等 0.52 1.34 https://leetcode.com/problems/replace-words 34509 66357 442 109
649 Dota2 参议院     中等 0.37 0.65 https://leetcode.com/problems/dota2-senate 8621 22890 199 155
650 只有两个键的键盘     中等 0.46 0.53 https://leetcode.com/problems/2-keys-keyboard 34244 73464 669 42
651 4键键盘     中等 0.5 0 https://leetcode.com/problems/4-keys-keyboard
652 寻找重复的子树     中等 0.45 0.75 https://leetcode.com/problems/find-duplicate-subtrees 37872 83063 759 156
653 两数之和 IV - 输入 BST     简单 0.52 0.36 https://leetcode.com/problems/two-sum-iv-input-is-a-bst 88495 168532 870 102
654 最大二叉树     中等 0.76 0.86 https://leetcode.com/problems/maximum-binary-tree 84590 111059 1098 130
655 输出二叉树     中等 0.51 1.26 https://leetcode.com/problems/print-binary-tree 20971 40418 218 550
656 金币路径     难 0.26 0 https://leetcode.com/problems/coin-path 2
657 机器人能否返回原点     简单 0.71 0.32 https://leetcode.com/problems/robot-return-to-origin 162655 227265 708 561
658 找到 K 个最接近的元素     中等 0.38 0.79 https://leetcode.com/problems/find-k-closest-elements 55655 146286 680 147
659 分割数组为连续子序列     中等 0.4 0 https://leetcode.com/problems/split-array-into-consecutive-subsequences 20550 50505 517 220
660 移除 9     难 0.51 0 https://leetcode.com/problems/remove-9 1
661 图片平滑器     简单 0.48 0.56 https://leetcode.com/problems/image-smoother 35527 72732 181 804
662 二叉树最大宽度     中等 0.39 0.62 https://leetcode.com/problems/maximum-width-of-binary-tree 33359 84099 633 111
663 均匀树划分     中等 0.38 0 https://leetcode.com/problems/equal-tree-partition
664 奇怪的打印机     难 0.36 0 https://leetcode.com/problems/strange-printer 9028 24572 257 33
665 非递减数列     简单 0.19 0.93 https://leetcode.com/problems/non-decreasing-array 53035 272264 1058 218
666 路径和 IV     中等 0.52 0 https://leetcode.com/problems/path-sum-iv 3
667 优美的排列 II     中等 0.52 0 https://leetcode.com/problems/beautiful-arrangement-ii 18166 34946 219 524
668 乘法表中第k小的数     难 0.42 0.9 https://leetcode.com/problems/kth-smallest-number-in-multiplication-table 12299 29311 319 19
669 修剪二叉搜索树     简单 0.6 0.17 https://leetcode.com/problems/trim-a-binary-search-tree 66467 110155 1127 131
670 最大交换     中等 0.39 0.43 https://leetcode.com/problems/maximum-swap 36463 91904 548 43
671 二叉树中第二小的节点     简单 0.43 0.41 https://leetcode.com/problems/second-minimum-node-in-a-binary-tree 49056 112842 376 560
672 灯泡开关 Ⅱ     中等 0.5 0.87 https://leetcode.com/problems/bulb-switcher-ii 9511 18998 91 684
673 最长递增子序列的个数     中等 0.33 1.35 https://leetcode.com/problems/number-of-longest-increasing-subsequence 30707 91399 790 57
674 最长连续递增序列     简单 0.44 0.66 https://leetcode.com/problems/longest-continuous-increasing-subsequence 67448 152116 436 93
675 为高尔夫比赛砍树     难 0.3 1.33 https://leetcode.com/problems/cut-off-trees-for-golf-event 15718 51134 273 153
676 实现一个魔法字典     中等 0.51 0.77 https://leetcode.com/problems/implement-magic-dictionary 25542 49436 365 98
677 键值映射     中等 0.51 0 https://leetcode.com/problems/map-sum-pairs 26325 51025 300 58
678 有效的括号字符串     中等 0.32 0.84 https://leetcode.com/problems/valid-parenthesis-string 28671 87574 665 24
679 24 点游戏     难 0.42 2.36 https://leetcode.com/problems/24-game 20765 48412 382 86
680 验证回文字符串 Ⅱ     简单 0.34 0.63 https://leetcode.com/problems/valid-palindrome-ii 74648 217812 733 46
681 最近时刻     中等 0.42 0 https://leetcode.com/problems/next-closest-time 6
682 棒球比赛     简单 0.61 0.7 https://leetcode.com/problems/baseball-game 54184 88738 313 777
683 K 个空花盆     难 0.34 0 https://leetcode.com/problems/k-empty-slots 6
684 冗余连接     中等 0.51 0 https://leetcode.com/problems/redundant-connection 51011 98249 650 191
685 冗余连接 II     难 0.3 0 https://leetcode.com/problems/redundant-connection-ii 22741 73973 450 154
686 重复叠加字符串匹配     简单 0.31 0.67 https://leetcode.com/problems/repeated-string-match 68170 216920 498 482
687 最长同值路径     简单 0.33 0.43 https://leetcode.com/problems/longest-univalue-path 59472 176012 982 229
688 “马”在棋盘上的概率     中等 0.44 0.63 https://leetcode.com/problems/knight-probability-in-chessboard 20726 46543 362 79
689 三个无重叠子数组的最大和     难 0.44 1.13 https://leetcode.com/problems/maximum-sum-of-3-non-overlapping-subarrays 25805 58413 582 33
690 员工的重要性     简单 0.54 0 https://leetcode.com/problems/employee-importance 46372 85571 401 397
691 贴纸拼词     难 0.38 0 https://leetcode.com/problems/stickers-to-spell-word 8372 21868 245 25
692 前K个高频单词     中等 0.45 1.27 https://leetcode.com/problems/top-k-frequent-words 64903 141742 738 67
693 交替位二进制数     简单 0.57 0 https://leetcode.com/problems/binary-number-with-alternating-bits 41722 72000 298 69
694 不同岛屿的数量     中等 0.51 1.65 https://leetcode.com/problems/number-of-distinct-islands
695 岛屿的最大面积     中等 0.57 0.84 https://leetcode.com/problems/max-area-of-island 83687 145916 1103 62
696 计数二进制子串     简单 0.53 0.76 https://leetcode.com/problems/count-binary-substrings 31074 58121 628 112
697 数组的度     简单 0.5 0.9 https://leetcode.com/problems/degree-of-an-array 49990 99007 505 441
698 划分为k个相等的子集     中等 0.42 1.47 https://leetcode.com/problems/partition-to-k-equal-sum-subsets 43009 101366 823 50
699 掉落的方块     难 0.4 0 https://leetcode.com/problems/falling-squares 8979 22419 166 26
700 二叉搜索树中的搜索     简单 0.68 0.09 https://leetcode.com/problems/search-in-a-binary-search-tree 60535 88712 316 92
701 二叉搜索树中的插入操作     中等 0.75 0.21 https://leetcode.com/problems/insert-into-a-binary-search-tree 45404 59826 336 39
702 搜索长度未知的有序数组     中等 0.58 0 https://leetcode.com/problems/search-in-a-sorted-array-of-unknown-size 1
703 数据流中的第K大元素     简单 0.46 1.22 https://leetcode.com/problems/kth-largest-element-in-a-stream 33535 72275 305 139
704 二分查找     简单 0.47 1.07 https://leetcode.com/problems/binary-search 51579 108007 252 31
705 设计哈希集合     简单 0.53 0.53 https://leetcode.com/problems/design-hashset 21247 39489 132 36
706 设计哈希映射     简单 0.56 0.44 https://leetcode.com/problems/design-hashmap 33806 60286 308 52
707 设计链表     简单 0.22 0.6 https://leetcode.com/problems/design-linked-list 26958 122878 309 247
708 循环有序列表的插入     中等 0.29 0 https://leetcode.com/problems/insert-into-a-cyclic-sorted-list 1
709 转换成小写字母     简单 0.76 0.87 https://leetcode.com/problems/to-lower-case 109345 142184 274 945
710 黑名单中的随机数     难 0.31 1.12 https://leetcode.com/problems/random-pick-with-blacklist 6107 19580 152 36
711 不同岛屿的数量 II     难 0.46 0 https://leetcode.com/problems/number-of-distinct-islands-ii 3
712 两个字符串的最小ASCII删除和     中等 0.54 0.75 https://leetcode.com/problems/minimum-ascii-delete-sum-for-two-strings 20857 38184 555 37
713 乘积小于K的子数组     中等 0.36 1.11 https://leetcode.com/problems/subarray-product-less-than-k 29854 81373 620 30
714 买卖股票的最佳时机含手续费     中等 0.5 0.85 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee 39766 78655 913 31
715 Range 模块     难 0.35 2.19 https://leetcode.com/problems/range-module 11597 32617 285 24
716 最大栈     简单 0.4 0 https://leetcode.com/problems/max-stack 5
717 1比特与2比特字符     简单 0.49 1.11 https://leetcode.com/problems/1-bit-and-2-bit-characters 41238 83762 258 661
718 最长重复子数组     中等 0.46 1.2 https://leetcode.com/problems/maximum-length-of-repeated-subarray 34000 73825 633 29
719 找出第 k 小的距离对     难 0.29 0 https://leetcode.com/problems/find-k-th-smallest-pair-distance 19832 67994 544 20
720 词典中最长的单词     简单 0.44 0.3 https://leetcode.com/problems/longest-word-in-dictionary 35731 79880 343 430
721 账户合并     中等 0.4 0 https://leetcode.com/problems/accounts-merge 33589 82894 628 172
722 删除注释     中等 0.31 1.44 https://leetcode.com/problems/remove-comments 15469 49483 165 541
723 粉碎糖果     中等 0.63 0 https://leetcode.com/problems/candy-crush 3
724 寻找数组的中心索引     简单 0.41 0.14 https://leetcode.com/problems/find-pivot-index 70583 171353 616 151
725 分隔链表     中等 0.48 0.48 https://leetcode.com/problems/split-linked-list-in-parts 27734 56651 352 81
726 原子的数量     难 0.44 1.94 https://leetcode.com/problems/number-of-atoms 10841 24263 208 85
727 最小窗口子序列     难 0.37 0 https://leetcode.com/problems/minimum-window-subsequence 2
728 自除数     简单 0.7 0.24 https://leetcode.com/problems/self-dividing-numbers 79072 112607 425 228
729 我的日程安排表 I     中等 0.47 0.67 https://leetcode.com/problems/my-calendar-i 32356 68269 354 27
730 统计不同回文子字符串     难 0.38 0 https://leetcode.com/problems/count-different-palindromic-subsequences 8632 22174 295 31
731 我的日程安排表 II     中等 0.44 0 https://leetcode.com/problems/my-calendar-ii 23326 52406 349 57
732 我的日程安排表 III     难 0.54 1.39 https://leetcode.com/problems/my-calendar-iii 12684 23090 222 85
733 图像渲染     简单 0.5 0.78 https://leetcode.com/problems/flood-fill 48485 95190 434 98
734 句子相似性     简单 0.4 0 https://leetcode.com/problems/sentence-similarity 3
735 行星碰撞     中等 0.38 0 https://leetcode.com/problems/asteroid-collision 25260 65603 436 57
736 Lisp 语法解析     难 0.44 0 https://leetcode.com/problems/parse-lisp-expression 6508 14674 144 127
737 句子相似性 II     中等 0.43 0 https://leetcode.com/problems/sentence-similarity-ii
738 单调递增的数字     中等 0.41 0.92 https://leetcode.com/problems/monotone-increasing-digits 13676 32703 237 42
739 每日温度     中等 0.6 0.6 https://leetcode.com/problems/daily-temperatures 67957 113206 1276 33
740 删除与获得点数     中等 0.45 0.51 https://leetcode.com/problems/delete-and-earn 21864 47596 601 52
741 摘樱桃     难 0.29 1.52 https://leetcode.com/problems/cherry-pickup 9583 32143 406 32
742 二叉树最近的叶节点     中等 0.39 0 https://leetcode.com/problems/closest-leaf-in-a-binary-tree 3
743 网络延迟时间     中等 0.42 1.41 https://leetcode.com/problems/network-delay-time 34267 81411 610 168
744 寻找比目标字母大的最小字母     简单 0.44 0 https://leetcode.com/problems/find-smallest-letter-greater-than-target 41481 94117 222 344
745 前缀和后缀搜索     难 0.3 0 https://leetcode.com/problems/prefix-and-suffix-search 12395 40407 196 151
746 使用最小花费爬楼梯     简单 0.47 0.87 https://leetcode.com/problems/min-cost-climbing-stairs 81911 173290 1074 240
747 至少是其他数字两倍的最大数     简单 0.4 0.08 https://leetcode.com/problems/largest-number-at-least-twice-of-others 51569 127133 201 410
748 最短完整词     简单 0.54 0.65 https://leetcode.com/problems/shortest-completing-word 20485 37717 116 432
749 隔离病毒     难 0.41 0 https://leetcode.com/problems/contain-virus 2919 7085 47 155
750 角矩形的数量     中等 0.64 0 https://leetcode.com/problems/number-of-corner-rectangles 2
751 IP 到 CIDR     简单 0.59 0 https://leetcode.com/problems/ip-to-cidr 0
752 打开转盘锁     中等 0.46 0.26 https://leetcode.com/problems/open-the-lock 22116 47947 378 23
753 破解保险箱     难 0.46 0 https://leetcode.com/problems/cracking-the-safe 15071 32493 267 296
754 到达终点数字     简单 0.32 0.82 https://leetcode.com/problems/reach-a-number 10476 32091 275 226
755 倒水     中等 0.4 0 https://leetcode.com/problems/pour-water 3
756 金字塔转换矩阵     中等 0.51 0 https://leetcode.com/problems/pyramid-transition-matrix 13361 25904 176 266
757 设置交集大小至少为2     难 0.37 0 https://leetcode.com/problems/set-intersection-size-at-least-two 4569 12346 163 14
758 字符串中的加粗单词     简单 0.42 0 https://leetcode.com/problems/bold-words-in-string 1
759 员工空闲时间     难 0.61 0 https://leetcode.com/problems/employee-free-time 2
760 找出变位映射     简单 0.79 0 https://leetcode.com/problems/find-anagram-mappings 7
761 特殊的二进制序列     难 0.51 2.28 https://leetcode.com/problems/special-binary-string 4762 9256 168 67
762 二进制表示中质数个计算置位     简单 0.59 0.25 https://leetcode.com/problems/prime-number-of-set-bits-in-binary-representation 29010 48911 158 237
763 划分字母区间     中等 0.7 0.26 https://leetcode.com/problems/partition-labels 49096 69678 945 52
764 最大加号标志     中等 0.43 0 https://leetcode.com/problems/largest-plus-sign 13274 30641 266 63
765 情侣牵手     难 0.51 1.08 https://leetcode.com/problems/couples-holding-hands 14621 28373 352 46
766 托普利茨矩阵     简单 0.61 0 https://leetcode.com/problems/toeplitz-matrix 61030 98797 610 67
767 重构字符串     中等 0.42 0.82 https://leetcode.com/problems/reorganize-string 27190 64143 543 27
768 最多能完成排序的块 II     难 0.45 0 https://leetcode.com/problems/max-chunks-to-make-sorted-ii 12086 26321 242 8
769 最多能完成排序的块     中等 0.51 0 https://leetcode.com/problems/max-chunks-to-make-sorted
770 基本计算器 IV     难 0.45 0 https://leetcode.com/problems/basic-calculator-iv 2234 4916 39 320
771 宝石与石头     简单 0.83 0.95 https://leetcode.com/problems/jewels-and-stones 259394 312016 1438 264
772 基本计算器 III     难 0.44 0 https://leetcode.com/problems/basic-calculator-iii 2
773 滑动谜题     难 0.52 1.18 https://leetcode.com/problems/sliding-puzzle 15976 30438 314 11
774 最小化去加油站的最大距离     难 0.41 0 https://leetcode.com/problems/minimize-max-distance-to-gas-station 2
775 全局倒置与局部倒置     中等 0.38 0.75 https://leetcode.com/problems/global-and-local-inversions 12714 32654 203 116
776 拆分二叉搜索树     中等 0.52 0 https://leetcode.com/problems/split-bst
777 在LR字符串中交换相邻字符     中等 0.33 0 https://leetcode.com/problems/swap-adjacent-in-lr-string 14896 44658 215 203
778 水位上升的泳池中游泳     难 0.47 0 https://leetcode.com/problems/swim-in-rising-water 12202 25568 306 30
779 第K个语法符号     中等 0.37 0 https://leetcode.com/problems/k-th-symbol-in-grammar 14336 38245 220 84
780 到达终点     难 0.27 0 https://leetcode.com/problems/reaching-points 8933 32453 236 45
781 森林中的兔子     中等 0.51 0 https://leetcode.com/problems/rabbits-in-forest 13040 25173 153 199
782 变为棋盘     难 0.39 1.47 https://leetcode.com/problems/transform-to-chessboard 3026 7617 83 89
783 二叉搜索树结点最小距离     简单 0.5 0.46 https://leetcode.com/problems/minimum-distance-between-bst-nodes 33385 66047 361 87
784 字母大小写全排列     简单 0.57 0.41 https://leetcode.com/problems/letter-case-permutation 46837 82152 633 77
785 判断二分图     中等 0.43 1 https://leetcode.com/problems/is-graph-bipartite 43942 101322 645 78
786 第 K 个最小的素数分数     难 0.39 0 https://leetcode.com/problems/k-th-smallest-prime-fraction 7944 19942 219 9
787 K 站中转内最便宜的航班     中等 0.34 0.87 https://leetcode.com/problems/cheapest-flights-within-k-stops 40986 117343 759 30
788 旋转数字     简单 0.54 0 https://leetcode.com/problems/rotated-digits 27740 51151 200 688
789 逃脱阻碍者     中等 0.55 0 https://leetcode.com/problems/escape-the-ghosts 10148 18337 124 257
790 多米诺和托米诺平铺     中等 0.35 0 https://leetcode.com/problems/domino-and-tromino-tiling 8219 22925 244 124
791 自定义字符串排序     中等 0.62 0 https://leetcode.com/problems/custom-sort-string 34437 55439 385 128
792 匹配子序列的单词数     中等 0.43 1.22 https://leetcode.com/problems/number-of-matching-subsequences 20635 47867 471 37
793 阶乘函数后K个零     难 0.39 1.71 https://leetcode.com/problems/preimage-size-of-factorial-zeroes-function 5540 14211 100 44
794 有效的井字游戏     中等 0.29 0.91 https://leetcode.com/problems/valid-tic-tac-toe-state 11267 38160 93 312
795 区间子数组个数     中等 0.43 1.08 https://leetcode.com/problems/number-of-subarrays-with-bounded-maximum
796 旋转字符串     简单 0.49 0.76 https://leetcode.com/problems/rotate-string 40465 82477 397 37
797 所有可能的路径     中等 0.7 1.57 https://leetcode.com/problems/all-paths-from-source-to-target 28238 40027 400 35
798 得分最高的最小轮调     难 0.4 2.28 https://leetcode.com/problems/smallest-rotation-with-highest-score 4322 10729 164 12
799 香槟塔     中等 0.34 1.86 https://leetcode.com/problems/champagne-tower 19
800 相似 RGB 颜色     简单 0.59 0 https://leetcode.com/problems/similar-rgb-color
801 使序列递增的最小交换次数     中等 0.34 0 https://leetcode.com/problems/minimum-swaps-to-make-sequences-increasing 13826 39849 497 28
802 找到最终的安全状态     中等 0.43 0 https://leetcode.com/problems/find-eventual-safe-states 17421 39846 354 51
803 打砖块     难 0.28 1.73 https://leetcode.com/problems/bricks-falling-when-hit 10428 36365 296 90
804 唯一摩尔斯密码词     简单 0.74 0.39 https://leetcode.com/problems/unique-morse-code-words 88239 118038 426 352
805 数组的均值分割     难 0.24 2.04 https://leetcode.com/problems/split-array-with-same-average 9079 37302 221 44
806 写字符串需要的行数     简单 0.63 0 https://leetcode.com/problems/number-of-lines-to-write-string 27963 44284 152 609
807 保持城市天际线     中等 0.81 1.13 https://leetcode.com/problems/max-increase-to-keep-city-skyline 47156 57875 520 127
808 分汤     中等 0.37 0 https://leetcode.com/problems/soup-servings 6150 16420 96 340
809 情感丰富的文字     中等 0.43 0 https://leetcode.com/problems/expressive-words 13178 30262 105 328
810 黑板异或游戏     难 0.44 0 https://leetcode.com/problems/chalkboard-xor-game 2665 5932 42 139
811 子域名访问计数     简单 0.65 0 https://leetcode.com/problems/subdomain-visit-count 43416 66376 255 401
812 最大三角形面积     简单 0.56 0.66 https://leetcode.com/problems/largest-triangle-area 14624 26060 106 702
813 最大平均值和的分组     中等 0.45 0 https://leetcode.com/problems/largest-sum-of-averages 13245 29294 532 19
814 二叉树剪枝     中等 0.71 0.58 https://leetcode.com/problems/binary-tree-pruning 34219 48159 540 15
815 公交路线     难 0.4 2.06 https://leetcode.com/problems/bus-routes 21192 52858 410 18
816 模糊坐标     中等 0.44 0 https://leetcode.com/problems/ambiguous-coordinates
817 链表组件     中等 0.54 0.37 https://leetcode.com/problems/linked-list-components 24910 45589 213 531
818 赛车     难 0.35 1.21 https://leetcode.com/problems/race-car 9891 28250 265 31
819 最常见的单词     简单 0.42 0.3 https://leetcode.com/problems/most-common-word 55292 131028 306 690
820 单词的压缩编码     中等 0.47 0 https://leetcode.com/problems/short-encoding-of-words 8428 17837 150 42
821 字符的最短距离     简单 0.63 1.06 https://leetcode.com/problems/shortest-distance-to-a-character 37506 59115 590 53
822 翻转卡片游戏     中等 0.4 0 https://leetcode.com/problems/card-flipping-game 6046 14988 46 334
823 带因子的二叉树     中等 0.32 0 https://leetcode.com/problems/binary-trees-with-factors 7121 21906 185 26
824 山羊拉丁文     简单 0.57 0.26 https://leetcode.com/problems/goat-latin 32037 55444 147 401
825 适龄的朋友     中等 0.36 0.76 https://leetcode.com/problems/friends-of-appropriate-ages 15428 42501 163 338
826 安排工作以达到最大收益     中等 0.35 0 https://leetcode.com/problems/most-profit-assigning-work 10788 30249 215 35
827 最大人工岛     难 0.43 0 https://leetcode.com/problems/making-a-large-island 9628 22239 261 9
828 独特字符串     难 0.39 1.29 https://leetcode.com/problems/unique-letter-string 5249 13279 208 27
829 连续整数求和     难 0.33 1.07 https://leetcode.com/problems/consecutive-numbers-sum 11627 34911 175 247
830 较大分组的位置     简单 0.47 0 https://leetcode.com/problems/positions-of-large-groups 26795 56012 205 51
831 隐藏个人信息     中等 0.42 0.98 https://leetcode.com/problems/masking-personal-information 6707 15924 48 196
832 翻转图像     简单 0.72 0.61 https://leetcode.com/problems/flipping-an-image 97541 134290 499 103
833 字符串中的查找与替换     中等 0.46 1.34 https://leetcode.com/problems/find-and-replace-in-string 18234 39365 159 221
834 树中距离之和     难 0.39 1.13 https://leetcode.com/problems/sum-of-distances-in-tree 7789 19690 440 22
835 图像重叠     中等 0.52 0 https://leetcode.com/problems/image-overlap 11222 21370 185 267
836 矩形重叠     简单 0.46 0.31 https://leetcode.com/problems/rectangle-overlap 25006 53732 328 73
837 新21点     中等 0.31 1.42 https://leetcode.com/problems/new-21-game 8465 26751 296 166
838 推多米诺     中等 0.43 1.12 https://leetcode.com/problems/push-dominoes 11664 26682 299 34
839 相似字符串组     难 0.34 1.06 https://leetcode.com/problems/similar-string-groups 8429 24416 155 54
840 矩阵中的幻方     简单 0.35 0.4 https://leetcode.com/problems/magic-squares-in-grid 12838 36117 73 659
841 钥匙和房间     中等 0.6 0.51 https://leetcode.com/problems/keys-and-rooms 34425 57085 464 37
842 将数组拆分成斐波那契序列     中等 0.34 0.75 https://leetcode.com/problems/split-array-into-fibonacci-sequence 10431 30068 251 82
843 猜猜这个单词     难 0.43 0 https://leetcode.com/problems/guess-the-word 20490 47035 260 284
844 比较含退格的字符串     简单 0.46 0.13 https://leetcode.com/problems/backspace-string-compare 57700 125414 640 43
845 数组中的最长山脉     中等 0.34 0.81 https://leetcode.com/problems/longest-mountain-in-array 17549 51212 305 13
846 一手顺子     中等 0.49 0.67 https://leetcode.com/problems/hand-of-straights
847 访问所有节点的最短路径     难 0.46 1.19 https://leetcode.com/problems/shortest-path-visiting-all-nodes 8016 17135 292 31
848 字母移位     中等 0.4 0.66 https://leetcode.com/problems/shifting-letters 13099 32116 157 29
849 到最近的人的最大距离     简单 0.4 1.08 https://leetcode.com/problems/maximize-distance-to-closest-person 32558 79555 407 64
850 矩形面积 II     难 0.44 0 https://leetcode.com/problems/rectangle-area-ii 6710 14934 176 22
851 喧闹和富有     中等 0.47 0 https://leetcode.com/problems/loud-and-rich 7709 16191 161 188
852 山脉数组的峰顶索引     简单 0.69 0.33 https://leetcode.com/problems/peak-index-in-a-mountain-array 76594 109968 284 658
853 车队     中等 0.39 1.12 https://leetcode.com/problems/car-fleet 15228 38342 237 140
854 相似度为 K 的字符串     难 0.33 0 https://leetcode.com/problems/k-similar-strings 7442 22261 160 17
855 考场就座     中等 0.38 0 https://leetcode.com/problems/exam-room 15029 39244 305 155
856 括号的分数     中等 0.56 0.41 https://leetcode.com/problems/score-of-parentheses 18480 32845 553 23
857 雇佣 K 名工人的最低成本     难 0.47 0 https://leetcode.com/problems/minimum-cost-to-hire-k-workers 17423 36783 531 55
858 镜面反射     中等 0.52 0 https://leetcode.com/problems/mirror-reflection 6593 12682 131 219
859 亲密字符串     简单 0.27 0.36 https://leetcode.com/problems/buddy-strings 24741 89534 291 173
860 柠檬水找零     简单 0.5 0.42 https://leetcode.com/problems/lemonade-change 27340 54157 285 54
861 翻转矩阵后的得分     中等 0.69 0 https://leetcode.com/problems/score-after-flipping-matrix 12172 17504 261 65
862 和至少为 K 的最短子数组     难 0.22 1.37 https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k 12762 57503 468 13
863 二叉树中所有距离为 K 的结点     中等 0.47 1.51 https://leetcode.com/problems/all-nodes-distance-k-in-binary-tree 22895 48218 738 14
864 获取所有钥匙的最短路径     难 0.36 1.5 https://leetcode.com/problems/shortest-path-to-get-all-keys 4893 13578 194 6
865 具有所有最深结点的最小子树     中等 0.55 0 https://leetcode.com/problems/smallest-subtree-with-all-the-deepest-nodes 17765 31877 356 94
866 回文素数     中等 0.2 1.05 https://leetcode.com/problems/prime-palindrome 7220 35799 83 256
867 转置矩阵     简单 0.64 0.54 https://leetcode.com/problems/transpose-matrix 45973 71901 200 217
868 二进制间距     简单 0.59 0 https://leetcode.com/problems/binary-gap 23346 39262 125 302
869 重新排序得到 2 的幂     中等 0.51 0 https://leetcode.com/problems/reordered-power-of-2 9318 18264 121 61
870 优势洗牌     中等 0.42 0.82 https://leetcode.com/problems/advantage-shuffle 11248 26484 249 20
871 最低加油次数     难 0.28 2.41 https://leetcode.com/problems/minimum-number-of-refueling-stops 7700 26642 338 6
872 叶子相似的树     简单 0.63 0.31 https://leetcode.com/problems/leaf-similar-trees 45042 71234 385 22
873 最长的斐波那契子序列的长度     中等 0.46 0.54 https://leetcode.com/problems/length-of-longest-fibonacci-subsequence 15693 33970 373 17
874 模拟行走机器人     简单 0.32 0.4 https://leetcode.com/problems/walking-robot-simulation 10018 31292 75 461
875 爱吃香蕉的珂珂     中等 0.46 0 https://leetcode.com/problems/koko-eating-bananas 13094 28387 297 33
876 链表的中间结点     简单 0.64 0.77 https://leetcode.com/problems/middle-of-the-linked-list 63332 98744 504 40
877 石子游戏     中等 0.61 0.54 https://leetcode.com/problems/stone-game 25976 42319 295 544
878 第 N 个神奇数字     难 0.25 0.88 https://leetcode.com/problems/nth-magical-number 5273 20664 107 37
879 盈利计划     难 0.36 0 https://leetcode.com/problems/profitable-schemes 5552 15134 148 16
880 索引处的解码字符串     中等 0.23 0 https://leetcode.com/problems/decoded-string-at-index 6931 30163 240 50
881 救生艇     中等 0.43 0.78 https://leetcode.com/problems/boats-to-save-people 15139 34617 250 23
882 细分图中的可到达结点     难 0.38 0 https://leetcode.com/problems/reachable-nodes-in-subdivided-graph 3279 8626 89 86
883 三维形体投影面积     简单 0.65 0 https://leetcode.com/problems/projection-area-of-3d-shapes 18231 27723 147 491
884 两句话中的不常见单词     简单 0.6 0.45 https://leetcode.com/problems/uncommon-words-from-two-sentences 30751 50556 233 61
885 螺旋矩阵 III     中等 0.64 1 https://leetcode.com/problems/spiral-matrix-iii 8798 13738 97 148
886 可能的二分法     中等 0.4 0 https://leetcode.com/problems/possible-bipartition 13258 32607 294 13
887 鸡蛋掉落     难 0.24 1.69 https://leetcode.com/problems/super-egg-drop 7002 28118 353 38
888 公平的糖果交换     简单 0.56 0.23 https://leetcode.com/problems/fair-candy-swap 27695 48737 291 76
889 根据前序和后序遍历构造二叉树     中等 0.6 1.24 https://leetcode.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal 15415 25639 392 21
890 查找和替换模式     中等 0.71 0.49 https://leetcode.com/problems/find-and-replace-pattern 28398 39930 359 34
891 子序列宽度之和     难 0.28 0 https://leetcode.com/problems/sum-of-subsequence-widths
892 三维形体的表面积     简单 0.56 0.45 https://leetcode.com/problems/surface-area-of-3d-shapes 11068 19770 151 181
893 特殊等价字符串组     简单 0.62 0.87 https://leetcode.com/problems/groups-of-special-equivalent-strings 15128 24145 147 636
894 所有可能的满二叉树     中等 0.7 0.43 https://leetcode.com/problems/all-possible-full-binary-trees 17723 25063 411 35
895 最大频率栈     难 0.56 0 https://leetcode.com/problems/maximum-frequency-stack 13204 23545 431 9
896 单调数列     简单 0.55 0 https://leetcode.com/problems/monotonic-array 44001 79594 266 25
897 递增顺序查找树     简单 0.64 0 https://leetcode.com/problems/increasing-order-search-tree 31013 47977 266 291
898 子数组按位或操作     中等 0.34 0 https://leetcode.com/problems/bitwise-ors-of-subarrays 7856 23098 242 54
899 有序队列     难 0.47 0 https://leetcode.com/problems/orderly-queue 4224 8940 100 128
900 RLE 迭代器     中等 0.5 0.88 https://leetcode.com/problems/rle-iterator 13502 26893 120 53
901 股票价格跨度     中等 0.48 0.63 https://leetcode.com/problems/online-stock-span 10330 21102 212 49
902 最大为 N 的数字组合     难 0.28 0 https://leetcode.com/problems/numbers-at-most-n-given-digit-set 4328 15132 96 24
903 DI 序列的有效排列     难 0.44 1.52 https://leetcode.com/problems/valid-permutations-for-di-sequence 2885 6531 154 22
904 水果成篮     中等 0.41 1.07 https://leetcode.com/problems/fruit-into-baskets 53883 129990 442 678
905 按奇偶排序数组     简单 0.72 0.56 https://leetcode.com/problems/sort-array-by-parity 99018 136395 464 52
906 超级回文数     难 0.3 0 https://leetcode.com/problems/super-palindromes 3259 10731 46 123
907 子数组的最小值之和     中等 0.27 0 https://leetcode.com/problems/sum-of-subarray-minimums 10729 39301 491 34
908 最小差值 I     简单 0.64 0.36 https://leetcode.com/problems/smallest-range-i 23656 36671 101 628
909 蛇梯棋     中等 0.33 1.23 https://leetcode.com/problems/snakes-and-ladders 10453 31228 125 354
910 最小差值 II     中等 0.23 0 https://leetcode.com/problems/smallest-range-ii 5881 24910 172 116
911 在线选举     中等 0.46 1.31 https://leetcode.com/problems/online-election 12477 26615 177 118
912 排序数组     中等 0.63 0.79 https://leetcode.com/problems/sort-an-array 9016 14175 51 67
913 猫和老鼠     难 0.28 2.15 https://leetcode.com/problems/cat-and-mouse 4187 14498 169 32
914 卡牌分组     简单 0.34 0.98 https://leetcode.com/problems/x-of-a-kind-in-a-deck-of-cards 18789 55139 226 48
915 分割数组     中等 0.43 0.6 https://leetcode.com/problems/partition-array-into-disjoint-intervals 10969 25310 194 15
916 单词子集     中等 0.45 0.69 https://leetcode.com/problems/word-subsets 10771 23790 159 50
917 仅仅反转字母     简单 0.55 0.53 https://leetcode.com/problems/reverse-only-letters 26956 48180 253 26
918 环形子数组的最大和     中等 0.31 0.78 https://leetcode.com/problems/maximum-sum-circular-subarray 10394 32692 331 19
919 完全二叉树插入器     中等 0.55 0 https://leetcode.com/problems/complete-binary-tree-inserter 8739 15878 139 36
920 播放列表的数量     难 0.43 1.98 https://leetcode.com/problems/number-of-music-playlists 5288 12057 206 27
921 使括号有效的最少添加     中等 0.7 0.58 https://leetcode.com/problems/minimum-add-to-make-parentheses-valid 25352 36149 264 21
922 按奇偶排序数组 II     简单 0.67 0.33 https://leetcode.com/problems/sort-array-by-parity-ii 43650 65099 286 29
923 三数之和的多种可能     中等 0.33 0 https://leetcode.com/problems/3sum-with-multiplicity 10580 31432 198 38
924 尽量减少恶意软件的传播     难 0.4 0 https://leetcode.com/problems/minimize-malware-spread 11921 29839 150 118
925 长按键入     简单 0.44 0 https://leetcode.com/problems/long-pressed-name 16774 37806 235 28
926 将字符串翻转到单调递增     中等 0.49 0 https://leetcode.com/problems/flip-string-to-monotone-increasing 11837 23901 305 13
927 三等分     难 0.3 1.06 https://leetcode.com/problems/three-equal-parts 3896 12834 84 36
928 尽量减少恶意软件的传播 II     难 0.39 1.55 https://leetcode.com/problems/minimize-malware-spread-ii 4612 11764 83 25
929 独特的电子邮件地址     简单 0.71 0.34 https://leetcode.com/problems/unique-email-addresses 118784 167288 462 127
930 和相同的二元子数组     中等 0.38 1.12 https://leetcode.com/problems/binary-subarrays-with-sum 9674 25439 219 12
931 下降路径最小和     中等 0.58 0 https://leetcode.com/problems/minimum-falling-path-sum 17870 30354 256 31
932 漂亮数组     中等 0.53 0 https://leetcode.com/problems/beautiful-array 5253 9907 173 230
933 最近的请求次数     简单 0.69 0.77 https://leetcode.com/problems/number-of-recent-calls 22507 32361 132 623
934 最短的桥     中等 0.43 1.51 https://leetcode.com/problems/shortest-bridge 10003 22797 282 19
935 骑士拨号器     中等 0.4 1.32 https://leetcode.com/problems/knight-dialer 11623 28505 202 62
936 戳印序列     难 0.35 0 https://leetcode.com/problems/stamping-the-sequence 3131 8725 90 28
937 重新排列日志文件     简单 0.57 0.42 https://leetcode.com/problems/reorder-log-files 21715 37990 137 411
938 二叉搜索树的范围和     简单 0.79 0.45 https://leetcode.com/problems/range-sum-of-bst 56090 70896 340 53
939 最小面积矩形     中等 0.5 1.64 https://leetcode.com/problems/minimum-area-rectangle 17794 35240 245 50
940 不同的子序列 II     难 0.39 1.16 https://leetcode.com/problems/distinct-subsequences-ii 5691 14321 189 9
941 有效的山脉数组     简单 0.35 0.24 https://leetcode.com/problems/valid-mountain-array 19790 56012 138 38
942 增减字符串匹配     简单 0.7 0.53 https://leetcode.com/problems/di-string-match 31284 44656 417 146
943 最短超级串     难 0.38 1.44 https://leetcode.com/problems/find-the-shortest-superstring 4361 11466 145 49
944 删列造序     简单 0.69 0.33 https://leetcode.com/problems/delete-columns-to-make-sorted 21998 31735 45 857
945 使数组唯一的最小增量     中等 0.42 1.08 https://leetcode.com/problems/minimum-increment-to-make-array-unique 10693 24913 159 7
946 验证栈序列     中等 0.57 1.12 https://leetcode.com/problems/validate-stack-sequences 13910 24127 248 6
947 移除最多的同行或同列石头     中等 0.54 0 https://leetcode.com/problems/most-stones-removed-with-same-row-or-column 21452 39561 425 115
948 令牌放置     中等 0.39 0 https://leetcode.com/problems/bag-of-tokens 6267 15942 93 80
949 给定数字能组成的最大时间     简单 0.34 0 https://leetcode.com/problems/largest-time-for-given-digits 8685 25542 66 192
950 按递增顺序显示卡牌     中等 0.71 0.58 https://leetcode.com/problems/reveal-cards-in-increasing-order 14969 20814 316 63
951 翻转等价二叉树     中等 0.65 0 https://leetcode.com/problems/flip-equivalent-binary-trees 15893 24335 229 10
952 按公因数计算最大组件大小     难 0.26 0 https://leetcode.com/problems/largest-component-size-by-common-factor 4550 17342 103 30
953 验证外星语词典     简单 0.55 0 https://leetcode.com/problems/verifying-an-alien-dictionary 20069 36084 175 64
954 二倍数对数组     中等 0.34 0.73 https://leetcode.com/problems/array-of-doubled-pairs 8932 26013 110 20
955 删列造序 II     中等 0.31 0 https://leetcode.com/problems/delete-columns-to-make-sorted-ii 5307 16932 124 25
956 最高的广告牌     难 0.38 0 https://leetcode.com/problems/tallest-billboard 3935 10346 170 8
957 N 天后的牢房     中等 0.38 0 https://leetcode.com/problems/prison-cells-after-n-days 12034 31666 105 212
958 二叉树的完全性检验     中等 0.47 0.44 https://leetcode.com/problems/check-completeness-of-a-binary-tree 14380 30530 221 5
959 由斜杠划分区域     中等 0.62 0 https://leetcode.com/problems/regions-cut-by-slashes 6446 10314 269 62
960 删列造序 III     难 0.52 0 https://leetcode.com/problems/delete-columns-to-make-sorted-iii 3559 6759 135 4
961 重复 N 次的元素     简单 0.72 0.48 https://leetcode.com/problems/n-repeated-element-in-size-2n-array 56168 77495 194 130
962 最大宽度坡     中等 0.41 0 https://leetcode.com/problems/maximum-width-ramp 8977 21595 252 9
963 最小面积矩形 II     中等 0.44 0 https://leetcode.com/problems/minimum-area-rectangle-ii 4480 10113 55 106
964 表示数字的最少运算符     难 0.4 0 https://leetcode.com/problems/least-operators-to-express-number 2248 5559 77 23
965 单值二叉树     简单 0.66 0 https://leetcode.com/problems/univalued-binary-tree 34031 50855 177 31
966 元音拼写检查器     中等 0.41 0 https://leetcode.com/problems/vowel-spellchecker 5020 12043 60 128
967 连续差相同的数字     中等 0.36 0.75 https://leetcode.com/problems/numbers-with-same-consecutive-differences 7169 19415 81 28
968 监控二叉树     难 0.35 0 https://leetcode.com/problems/binary-tree-cameras 6885 19573 260 10
969 煎饼排序     中等 0.62 1.08 https://leetcode.com/problems/pancake-sorting 10308 16500 128 152
970 强整数     简单 0.39 0 https://leetcode.com/problems/powerful-integers 10948 27749 63 136
971 翻转二叉树以匹配先序遍历     中等 0.42 0.99 https://leetcode.com/problems/flip-binary-tree-to-match-preorder-traversal 6009 14044 119 52
972 相等的有理数     难 0.4 0 https://leetcode.com/problems/equal-rational-numbers 2491 6195 24 89
973 最接近原点的 K 个点     中等 0.62 0.86 https://leetcode.com/problems/k-closest-points-to-origin 63545 101958 421 45
974 和可被 K 整除的子数组     中等 0.44 1.01 https://leetcode.com/problems/subarray-sums-divisible-by-k 11418 25503 271 24
975 奇偶跳     难 0.48 1.04 https://leetcode.com/problems/odd-even-jump 10809 22532 295 74
976 三角形的最大周长     简单 0.57 0.44 https://leetcode.com/problems/largest-perimeter-triangle 15718 27428 157 21
977 有序数组的平方     简单 0.72 0.7 https://leetcode.com/problems/squares-of-a-sorted-array 70827 98329 293 41
978 最长湍流子数组     中等 0.45 0.56 https://leetcode.com/problems/longest-turbulent-subarray 10044 22079 87 40
979 在二叉树中分配硬币     中等 0.67 0.47 https://leetcode.com/problems/distribute-coins-in-binary-tree 12970 19368 489 16
980 不同路径 III     难 0.71 0 https://leetcode.com/problems/unique-paths-iii 9021 12690 166 27
981 基于时间的键值存储     中等 0.5 0 https://leetcode.com/problems/time-based-key-value-store 12606 24926 197 34
982 按位与为零的三元组     难 0.53 1.12 https://leetcode.com/problems/triples-with-bitwise-and-equal-to-zero 4547 8444 52 76
983 最低票价     中等 0.57 0.79 https://leetcode.com/problems/minimum-cost-for-tickets 13755 24013 440 9
984 不含 AAA 或 BBB 的字符串     中等 0.33 0 https://leetcode.com/problems/string-without-aaa-or-bbb 9533 28343 88 163
985 查询后的偶数和     简单 0.63 0.21 https://leetcode.com/problems/sum-of-even-numbers-after-queries 20475 32147 144 64
986 区间列表的交集     中等 0.63 0 https://leetcode.com/problems/interval-list-intersections 16531 26250 245 15
987 二叉树的垂序遍历     中等 0.31 0 https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree 9630 30171 124 265
988 从叶结点开始的最小字符串     中等 0.46 0.61 https://leetcode.com/problems/smallest-string-starting-from-leaf 10618 22951 126 21
989 数组形式的整数加法     简单 0.44 0.33 https://leetcode.com/problems/add-to-array-form-of-integer 15566 34751 122 24
990 等式方程的可满足性     中等 0.39 0 https://leetcode.com/problems/satisfiability-of-equality-equations 7325 18399 188 3
991 坏了的计算器     中等 0.4 0.75 https://leetcode.com/problems/broken-calculator 6340 15771 131 52
992 K 个不同整数的子数组     难 0.44 0.81 https://leetcode.com/problems/subarrays-with-k-different-integers 6044 13540 284 6
993 二叉树的堂兄弟节点     简单 0.52 0.46 https://leetcode.com/problems/cousins-in-binary-tree 16795 31986 176 10
994 腐烂的橘子     简单 0.46 1.53 https://leetcode.com/problems/rotting-oranges 11664 25212 235 11
995 K 连续位的最小翻转次数     难 0.48 1.48 https://leetcode.com/problems/minimum-number-of-k-consecutive-bit-flips 4786 9825 119 22
996 正方形数组的数目     难 0.47 0 https://leetcode.com/problems/number-of-squareful-arrays 5456 11430 128 10
997 找到小镇的法官     简单 0.49 0.45 https://leetcode.com/problems/find-the-town-judge 16546 33685 146 21
998 最大二叉树 II     中等 0.61 0 https://leetcode.com/problems/maximum-binary-tree-ii 7534 12189 69 163
999 车的可用捕获量     简单 0.66 0.6 https://leetcode.com/problems/available-captures-for-rook 12828 19412 73 186
1000 合并石头的最低成本     难 0.31 0 https://leetcode.com/problems/minimum-cost-to-merge-stones 3432 10940 163 17
1001 网格照明     难 0.34 0 https://leetcode.com/problems/grid-illumination 4401 12833 90 36
1002 查找常用字符     简单 0.65 0.56 https://leetcode.com/problems/find-common-characters 23106 35086 251 39
1003 检查替换后的词是否有效     中等 0.51 0 https://leetcode.com/problems/check-if-word-is-valid-after-substitutions 8872 17119 72 124
1004 最大连续1的个数 III     中等 0.53 1.44 https://leetcode.com/problems/max-consecutive-ones-iii 10983 20657 213 6
1005 K 次取反后最大化的数组和     简单 0.49 0.27 https://leetcode.com/problems/maximize-sum-of-array-after-k-negations 11241 22680 98 18
1006 笨阶乘     中等 0.53 0 https://leetcode.com/problems/clumsy-factorial 7062 13152 39 83
1007 行相等的最少多米诺旋转     中等 0.47 0.75 https://leetcode.com/problems/minimum-domino-rotations-for-equal-row 8199 17170 51 59
1008 先序遍历构造二叉树     中等 0.72 0.99 https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal 13577 18616 206 10
1009 十进制整数的反码     简单 0.58 0 https://leetcode.com/problems/complement-of-base-10-integer 11039 18740 54 12
1010 总持续时间可被 60 整除的歌曲     简单 0.45 0.25 https://leetcode.com/problems/pairs-of-songs-with-total-durations-divisible-by-60 11234 24684 139 10
1011 在 D 天内送达包裹的能力     中等 0.53 1 https://leetcode.com/problems/capacity-to-ship-packages-within-d-days 9229 17393 249 9
1012 至少有 1 位重复的数字     难 0.34 1.81 https://leetcode.com/problems/numbers-with-repeated-digits 2546 7401 74 27
1013 将数组分成和相等的三个部分     简单 0.55 0.79 https://leetcode.com/problems/partition-array-into-three-parts-with-equal-sum 12887 23391 118 21
1014 最佳观光组合     中等 0.48 1.56 https://leetcode.com/problems/best-sightseeing-pair 7150 14666 178 11
1015 可被 K 整除的最小整数     中等 0.28 0 https://leetcode.com/problems/smallest-integer-divisible-by-k 5399 19243 47 154
1016 子串能表示从 1 到 N 数字的二进制串     中等 0.61 0 https://leetcode.com/problems/binary-string-with-substrings-representing-1-to-n 6475 10518 37 162
1017 负二进制转换     中等 0.56 0.77 https://leetcode.com/problems/convert-to-base-2 5602 9904 66 90
1018 可被 5 整除的二进制前缀     简单 0.46 0 https://leetcode.com/problems/binary-prefix-divisible-by-5 9920 21407 60 47
1019 链表中的下一个更大节点     中等 0.56 0.29 https://leetcode.com/problems/next-greater-node-in-linked-list 11323 20088 193 16
1020 飞地的数量     中等 0.54 1.04 https://leetcode.com/problems/number-of-enclaves 6999 12734 83 13
1021 删除最外层的括号     简单 0.76 0.21 https://leetcode.com/problems/remove-outermost-parentheses 23381 30688 118 167
1022 从根到叶的二进制数之和     简单 0.54 0 https://leetcode.com/problems/sum-of-root-to-leaf-binary-numbers 11175 20623 87 51
1023 驼峰式匹配     中等 0.56 0 https://leetcode.com/problems/camelcase-matching 7206 12736 62 55
1024 视频拼接     中等 0.47 0.56 https://leetcode.com/problems/video-stitching 7469 15850 140 15
1025 除数博弈     简单 0.63 0.16 https://leetcode.com/problems/divisor-game 11522 18281 83 219
1026 节点与其祖先之间的最大差值     中等 0.59 0.86 https://leetcode.com/problems/maximum-difference-between-node-and-ancestor 8391 14158 122 8
1027 最长等差数列     中等 0.46 0.58 https://leetcode.com/problems/longest-arithmetic-sequence 7534 16025 153 11
1028 从先序遍历还原二叉树     难 0.7 0 https://leetcode.com/problems/recover-a-tree-from-preorder-traversal 6157 8691 150 5
1029 两地调度     简单 0.53 0.82 https://leetcode.com/problems/two-city-scheduling 8732 16245 199 25
1030 距离顺序排列矩阵单元格     简单 0.65 0.28 https://leetcode.com/problems/matrix-cells-in-distance-order 9029 13773 65 36
1031 两个非重叠子数组的最大和     中等 0.55 0.77 https://leetcode.com/problems/maximum-sum-of-two-non-overlapping-subarrays 5611 10108 148 7
1032 字符流     难 0.41 1.31 https://leetcode.com/problems/stream-of-characters 4787 11686 81 23
1033 移动石子直到连续     简单 0.34 0.33 https://leetcode.com/problems/moving-stones-until-consecutive 5595 16082 22 229
1034 边框着色     中等 0.42 0 https://leetcode.com/problems/coloring-a-border 4386 10330 44 100
1035 不相交的线     中等 0.51 0 https://leetcode.com/problems/uncrossed-lines 5085 9889 150 5
1036 逃离大迷宫     难 0.37 1.6 https://leetcode.com/problems/escape-a-large-maze 3281 8878 74 47
1037 有效的回旋镖     简单 0.37 0.34 https://leetcode.com/problems/valid-boomerang 7085 18881 33 109
1038 从二叉搜索树到更大和树     中等 0.8 0 https://leetcode.com/problems/binary-search-tree-to-greater-sum-tree 9348 11664 142 15
1039 多边形三角剖分的最低得分     中等 0.4 0 https://leetcode.com/problems/minimum-score-triangulation-of-polygon 3096 7596 147 18
1040 移动石子直到连续 II     中等 0.45 1.81 https://leetcode.com/problems/moving-stones-until-consecutive-ii 1565 3424 58 59
1041 困于环中的机器人     简单 0.42 0 https://leetcode.com/problems/robot-bounded-in-circle 5571 13035 71 57
1042 不邻接植花     简单 0.47 1 https://leetcode.com/problems/flower-planting-with-no-adjacent 4916 10280 51 74
1043 分隔数组以得到最大和     中等 0.61 0.7 https://leetcode.com/problems/partition-array-for-maximum-sum 4461 7248 152 12
1044 最长重复子串     难 0.22 1.99 https://leetcode.com/problems/longest-duplicate-substring 1792 7801 50 54
1045 买下所有产品的客户     中等 0.63 0 https://leetcode.com/problems/customers-who-bought-all-products
1046 最后一块石头的重量     简单 0.63 0.42 https://leetcode.com/problems/last-stone-weight 9275 14715 75 6
1047 删除字符串中的所有相邻重复项     简单 0.62 0.12 https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string 10561 16770 103 11
1048 最长字符串链     中等 0.46 0 https://leetcode.com/problems/longest-string-chain 5889 12564 77 7
1049 最后一块石头的重量 II     中等 0.38 0.63 https://leetcode.com/problems/last-stone-weight-ii 3734 9586 137 4
1050 合作过至少三次的演员和导演     简单 0.77 0 https://leetcode.com/problems/actors-and-directors-who-cooperated-at-least-three-times
1051 高度检查器     简单 0.7 0.3 https://leetcode.com/problems/height-checker 8910 12674 32 248
1052 爱生气的书店老板     中等 0.51 0.47 https://leetcode.com/problems/grumpy-bookstore-owner
1053 交换一次的先前排列     中等 0.47 0 https://leetcode.com/problems/previous-permutation-with-one-swap 4055 8602 34 132
1054 距离相等的条形码     中等 0.38 0.57 https://leetcode.com/problems/distant-barcodes 4523 11861 92 3
1055 形成字符串的最短路径     中等 0.57 0 https://leetcode.com/problems/shortest-way-to-form-string 1
1056 易混淆数     简单 0.48 0 https://leetcode.com/problems/confusing-number 1
1057 校园自行车分配     中等 0.58 0 https://leetcode.com/problems/campus-bikes 1
1058 最小化舍入误差以满足目标     中等 0.38 0 https://leetcode.com/problems/minimize-rounding-error-to-meet-target 1
1059 从始点到终点的所有路径     中等 0.45 0 https://leetcode.com/problems/all-paths-from-source-lead-to-destination 0
1060 有序数组中的缺失元素     中等 0.53 0 https://leetcode.com/problems/missing-element-in-sorted-array 1
1061 按字典序排列最小的等效字符串     中等 0.62 0 https://leetcode.com/problems/lexicographically-smallest-equivalent-string 0
1062 最长重复子串     中等 0.49 0 https://leetcode.com/problems/longest-repeating-substring 2
1063 有效子数组的数目     难 0.77 0 https://leetcode.com/problems/number-of-valid-subarrays 0
1064 不动点     简单 0.82 0 https://leetcode.com/problems/fixed-point
1065 字符串的索引对     简单 0.58 0 https://leetcode.com/problems/index-pairs-of-a-string 2
1066 校园自行车分配 II     中等 0.39 0 https://leetcode.com/problems/campus-bikes-ii 3
1067 范围内的数字计数     难 0.32 0 https://leetcode.com/problems/digit-count-in-range 1
1068 Product Sales Analysis I     简单 0.81 0 https://leetcode.com/problems/product-sales-analysis-i 0
1069 Product Sales Analysis II     简单 0.79 0 https://leetcode.com/problems/product-sales-analysis-ii 0
1070 Product Sales Analysis III     中等 0.39 0 https://leetcode.com/problems/product-sales-analysis-iii 0
1071 字符串的最大公因子     简单 0.52 0.44 https://leetcode.com/problems/greatest-common-divisor-of-strings 5001 9531 54 21
1072 按列翻转得到最大值等行数     中等 0.54 0 https://leetcode.com/problems/flip-columns-for-maximum-number-of-equal-rows 3274 5971 79 7
1073 负二进制数相加     中等 0.3 0 https://leetcode.com/problems/adding-two-negabinary-numbers 2516 8122 41 21
1074 元素和为目标值的子矩阵数量     难 0.59 0 https://leetcode.com/problems/number-of-submatrices-that-sum-to-target 1871 3121 60 3
1075 Project Employees I 简单 0.6 0 https://leetcode.com/problems/project-employees-i 1
1076 Project Employees II 简单 0.51 0 https://leetcode.com/problems/project-employees-ii 3
1077 Project Employees III 中等 0.78 0 https://leetcode.com/problems/project-employees-iii
1078 Bigram 分词     简单 0.62 0.17 https://leetcode.com/problems/occurrences-after-bigram
1079 活字印刷     中等 0.68 0.4 https://leetcode.com/problems/letter-tile-possibilities
1080 根到叶路径上的不足节点     中等 0.37 0 https://leetcode.com/problems/insufficient-nodes-in-root-to-leaf-paths
1081 不同字符的最小子序列     中等 0.36 0 https://leetcode.com/problems/smallest-subsequence-of-distinct-characters
1082 Sales Analysis I     简单 0.74 1.09 https://leetcode.com/problems/sales-analysis-i
1083 Sales Analysis II     简单 0.43 0 https://leetcode.com/problems/sales-analysis-ii
1084 Sales Analysis III     简单 0.37 0.98 https://leetcode.com/problems/sales-analysis-iii
1085 最小元素各数位之和     简单 0.71 0 https://leetcode.com/problems/sum-of-digits-in-the-minimum-number
1086 前五科的均分     简单 0.64 0 https://leetcode.com/problems/high-five
1087 字母切换     中等 0.35 0 https://leetcode.com/problems/brace-expansion
1088 易混淆数 II     困难 0.2 0 https://leetcode.com/problems/confusing-number-ii
1089 复写零     简单 0.53 0 https://leetcode.com/problems/duplicate-zeros
1090 受标签影响的最大值     中等 0.41 0 https://leetcode.com/problems/largest-values-from-labels
1091 二进制矩阵中的最短路径     中等 0.23 0.54 https://leetcode.com/problems/shortest-path-in-binary-matrix
1092 最短公共超序列     困难 0.33 0 https://leetcode.com/problems/shortest-common-supersequence
1093 大样本统计     中等 0.33 0 https://leetcode.com/problems/statistics-from-a-large-sample
1094 拼车     中等 0.48 0.31 https://leetcode.com/problems/car-pooling
1095 山脉数组中查找目标值     困难 0.25 0.71 https://leetcode.com/problems/find-in-mountain-array
1096 花括号展开 II     困难 0.4 1.13 https://leetcode.com/problems/brace-expansion-ii
1097 Game Play Analysis V     困难 0.27 0 https://leetcode.com/problems/game-play-analysis-v
1098 Unpopular Books     中等 0.38 1.19 https://leetcode.com/problems/unpopular-books
1099 小于 K 的两数之和     简单 0.46 0 https://leetcode.com/problems/two-sum-less-than-k
1100 长度为 K 的无重复字符子串     中等 0.58 0 https://leetcode.com/problems/find-k-length-substrings-with-no-repeated-characters
1101 彼此熟识的最早时间     中等 0.56 0 https://leetcode.com/problems/the-earliest-moment-when-everyone-become-friends
1102 得分最高的路径     中等 0.18 0 https://leetcode.com/problems/path-with-maximum-minimum-value
1103 分糖果 II     简单 0.59 0.04 https://leetcode.com/problems/distribute-candies-to-people
1104 二叉树寻路     中等 0.6 0 https://leetcode.com/problems/path-in-zigzag-labelled-binary-tree
1105 填充书架     中等 0.48 0 https://leetcode.com/problems/filling-bookcase-shelves
1106 解析布尔表达式     困难 0.51 0.19 https://leetcode.com/problems/parsing-a-boolean-expression
1108 IP 地址无效化     简单 0.8 0.06 https://leetcode.com/problems/defanging-an-ip-address
1109 航班预订统计     中等 0.27 0 https://leetcode.com/problems/corporate-flight-bookings
1110 删点成林     中等 0.51 0 https://leetcode.com/problems/delete-nodes-and-return-forest
1111 有效括号的嵌套深度     中等 0.63 0.23 https://leetcode.com/problems/maximum-nesting-depth-of-two-valid-parentheses-strings
1114 按序打印     简单 0.55 0.73 https://leetcode.com/problems/print-in-order
1115 交替打印FooBar     中等 0.57 0.21 https://leetcode.com/problems/print-foobar-alternately
1116 打印零与奇偶数     中等 0.46 0.66 https://leetcode.com/problems/print-zero-even-odd
1117 H2O 生成     困难 0.32 0.44 https://leetcode.com/problems/building-h2o
1118 一月有多少天     简单 0.63 0 https://leetcode.com/problems/number-of-days-in-a-month
1119 删去字符串中的元音     简单 0.88 0 https://leetcode.com/problems/remove-vowels-from-a-string
1120 子树的最大平均值     中等 0.54 0 https://leetcode.com/problems/maximum-average-subtree
1121 将数组分成几个递增序列     困难 0.47 0 https://leetcode.com/problems/divide-array-into-increasing-sequences
1122 数组的相对排序     简单 0.61 0.21 https://leetcode.com/problems/relative-sort-array
1123 最深叶节点的最近公共祖先     中等 0.55 0.17 https://leetcode.com/problems/lowest-common-ancestor-of-deepest-leaves
1124 表现良好的最长时间段     中等 0.14 0.1 https://leetcode.com/problems/longest-well-performing-interval
1125 最小的必要团队     困难 0.32 0 https://leetcode.com/problems/smallest-sufficient-team
1128 等价多米诺骨牌对的数量     简单 0.32 0.13 https://leetcode.com/problems/number-of-equivalent-domino-pairs
1129 颜色交替的最短路径     中等 0.26 0 https://leetcode.com/problems/shortest-path-with-alternating-colors
1130 叶值的最小代价生成树     中等 0.48 0 https://leetcode.com/problems/minimum-cost-tree-from-leaf-values
1131 绝对值表达式的最大值     中等 0.28 0.39 https://leetcode.com/problems/maximum-of-absolute-value-expression
1133 最大唯一数     简单 0.54 0 https://leetcode.com/problems/largest-unique-number
1134 阿姆斯特朗数     简单 0.75 0 https://leetcode.com/problems/armstrong-number
1135 最低成本联通所有城市     中等 0.23 0 https://leetcode.com/problems/connecting-cities-with-minimum-cost
1136 平行课程     困难 0.45 0 https://leetcode.com/problems/parallel-courses
1137 第 N 个泰波那契数    新 简单 0.57 0 https://leetcode.com/problems/n-th-tribonacci-number
1138 字母板上的路径    新 中等 0.28 0 https://leetcode.com/problems/alphabet-board-path
1139 最大的以 1 为边界的正方形    新 中等 0.32 0 https://leetcode.com/problems/largest-1-bordered-square
1140 石子游戏 II    新 中等 0.45 0 https://leetcode.com/problems/stone-game-ii

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