lrucacheleetcode-leet-code-30day-challenge:这个存储库有在LeetCode30天挑战期

# LeetCode April 30 day challenge This repository has the solved problems posted during the [LeetCode]([https://leetcode.com/].(https://leetcode.com/)) 30 day challenge. April 1st to April 30th 2020. April Challenge - [https://leetcode.com/explore/challenge/card/30-day-leetcoding-challenge/].(https://leetcode.com/explore/challenge/card/30-day-leetcoding-challenge/) ### Problems 1. [Single Number](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/1.js) 2. [Happy Number](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/2.js) 3. [Maximum Subarray](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/3.js) 4. [Move Zeroes](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/4.js) 5. [Best Time to Buy and Sell Stock II](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/5.js) 6. [Group Anagrams](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/6.js) 7. [Counting Elements](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/7.js) 8. [Middle of the LinkedList](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/8.js) 9. [Backspace String Compare](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/9.js) 10. [Min Stack](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/10.js) 11. [Diameter of a Binary Tree](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/11.js) 12. [Last Stone Weight](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/12.js) 13. [Contiguous Array](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/13.js) 14. [Perform String Shifts](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/14.js) 15. [Product of Array Except Self](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/15.js) 16. [Valid Parenthesis String](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/16.js) 17. [Number of Islands](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/17.js) 18. [Minimum Path Sum](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/18.js) 19. [Search in a Rotated Sorted Array](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/19.js) 20. [Construct a Binary Search Tree from Preorder Traversal](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/20.js) 21. [Leftmost Column with at least a One](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/21.js) 22. [Subarray Sum Equals K](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/22.js) 23. [Bitwise AND of Numbers Range](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/23.js) 24. [LRU Cache](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/24.js) 25. [Jump Game](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/25.js) 26. [Longest Common Subsequence](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/26.js) 27. [Maximal Square](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/27.js) 28. [First Unique Number](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/28.js) 29. [Binary Tree Maximum Path Sum](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/29.js) 30. [Check if a String is a valid sequence from Root to Leaves Path in a Binary Tree](https://github.com/arunkumars0807/leet-code-30day-challenge/blob/master/30.js)