Current: 2月 https://leetcode.com/explore/challenge/card/february-leetcoding-challenge-2021/
刷题伴侣：LeetCode究极班

Directory发在这提醒自己写。

Take this Explore Card Challenge!

Week 1

136 Single Number √
202 Happy Number
53 Maximum Subarray
283 Move Zeroes
122 Best Time to Buy and Sell Stock II
49 Group Anagrams

Week 2

876 Middle of the Linked List
844 Backspace String Compare
155 Min Stack
543 Diameter of Binary Tree
1046 Last Stone Weight
525 Contiguous Array

Week 3

238 Product of Array Except Self
678.Valid Parenthesis String
200 Number of Islands
64 Minimum Path Sum √
33 Search in Rotated Sorted Array √
1008 Construct Binary Search Tree from Preorder Traversal

Week 4

560 Subarray Sum Equals K
201 Bitwise AND of Numbers Range
146 LRU Cache
55 Jump Game
1143 Longest Common Subsequence
221. Maximal Square 打钩√

May

Week 1

278 First Bad Version
771 Jewels and Stones √
383 Ransom Note
476 Number Complement
387 First Unique Character in a String
169 Majority Element
993 Cousins in Binary Tree

Week 2

1232 Check If It Is a Straight Line
367 Valid Perfect Square
997 Find the Town Judge
733. Flood Fill
540 Single Element in a Sorted Array
402 Remove K Digits
208 Implement Trie (Prefix Tree) √

Week 3

918 Maximum Sum Circular Subarray
328 Odd Even Linked List
438 Find All Anagrams in a String
567 Permutation in String
901 Online Stock Span
230 Kth Smallest Element in a BST
1277 Count Square Submatrices with All Ones

Week 4

451 Sort Characters By Frequency
986 Interval List Intersections
1008 Construct Binary Search Tree from Preorder Traversal
1035 Uncrossed Lines
525 Contiguous Array
886 Possible Bipartition
338 Counting Bits

2021 一月 【新年新气象】【牛气冲天呀冲冲冲】