DATE	PROBLEM	IMPORTANT
MAY 1	Backspace string compare	💡
MAY 2	Sort Array by parity	💡
MAY 3	Shortest Unsorted Continuous Subarray
MAY 4	Max Number of K-Sum Pairs	💡
MAY 5	Implement Stack using Queues	💡
MAY 6	Remove All Adjacent Duplicates in String II	💡
MAY 7	132 Pattern	💡
MAY 8	Flatten Nested List Iterator	💡
MAY 9	Letter Combinations of a Phone Number	💡
MAY 10	Combination Sum III	💡
MAY 11	Count Sorted Vowel Strings	💡
MAY 12	Permutations II
MAY 13	Populating Next Right Pointers in Each Node II
MAY 14	Network Delay Time	💡
MAY 15	Deepest Leaves Sum	💡
MAY 16	Shortest Path in Binary Matrix
MAY 17	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	💡
MAY 18	Critical Connections in a Network	💡
MAY 19	Longest Increasing Path in a Matrix
MAY 20	Unique Paths II	💡
MAY 21	Coin Change	💡
MAY 22	Palindromic Substrings	💡
MAY 23	Ones and Zeroes	💡
MAY 24	Longest Valid Parentheses
MAY 25	Russian Doll Envelopes	💡
MAY 26	Number of 1 Bits	💡
MAY 27	Number of Steps to Reduce a Number to Zero
MAY 28	Missing Number
MAY 29	Maximum Product of Word Lengths	💡
MAY 30	Divide Two Integers
MAY 31	Check If a String Contains All Binary Codes of Size K