题解 + Python/Java/C++/Go 代码： Q1 https://leetcode.cn/problems/count-subarrays-of-length-three-with-a-condition/solution/bian-li-pythonjavacgo-by-endlesscheng-emtn/ Q2 https://leetcode.cn/problems/count-paths-with-the-given-xor-value/solution/wang-ge-tu-dpcong-ji-yi-hua-sou-suo-dao-k1bpm/ Q3 https://leetcode.cn/problems/check-if-grid-can-be-cut-into-sections/solution/he-bing-qu-jian-pythonjavacgo-by-endless-dn1g/ Q4 https://leetcode.cn/problems/subsequences-with-a-unique-middle-mode-i/solution/zheng-nan-ze-fan-fen-lei-tao-lun-qian-ho-f7cd/
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