1 Two Sum Easy Solution.java 2 Add Two Numbers Medium Solution.java 3 Longest Substring Without Repeating Characters Medium Solution.java 11 Container With Most Water Medium Solution.java 14 Longest Common Prefix Easy Solution.java 20 Valid Parentheses Easy Solution.java 21 Merge Two Sorted Lists Easy Solution.java 23 Merge k Sorted Lists Hard Solution.java 27 Remove Element Easy Solution.java 34 Find First and Last Position of Element in Sorted Array Medium Solution.java 39 Combination Sum Medium Solution.java 46 Permutations Medium Solution.java 47 Permutations II Medium Solution.java 49 Group Anagrams Medium Solution.java 53 Maximum Subarray Medium Solution.java 56 Merge Intervals Medium Solution.java 61 Rotate List Medium Solution.java 62 Unique Paths](https://leetcode.com/problems/unique-paths/) Medium Solution.java 64 Minimum Path Sum](https://leetcode.com/problems/minimum-path-sum/) Medium Solution.java 70 Climbing Stairs Easy Solution.java 72 Edit Distance Medium Solution.java 73 Set Matrix Zeroes Medium Solution.java 77 Combinations Medium Solution.java 88 Merge Sorted Array Easy Solution.java 92 Reverse Linked List II Medium Solution.java 94 Binary Tree Inorder Traversal Medium Solution.java 98 Validate Binary Search Tree Medium Solution.java 100 Same Tree Easy Solution.java 102 Binary Tree Level Order Traversal Medium Solution.java 103 Binary Tree Zigzag Level Order Traversal Medium Solution.java 104 Maximum Depth of Binary Tree Easy Solution.java 108 Convert Sorted Array to Binary Search Tree Easy Solution.java 111 Minimum Depth of Binary Tree Easy Solution.java 114 Flatten Binary Tree to Linked List Medium Solution.java 115 Min Stack Medium Solution.java 129 Sum Root to Leaf Numbers Medium Solution.java 130 Surrounded Regions Medium Solution.java 133 Clone Graph Medium Solution.java 136 Single Number Easy Solution.java 139 Word Break Medium Solution.java 146 LRU Cache Medium Solution.java 151 Reverse Words in a String Medium Solution.java 162 Find Peak 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1329 Sort the Matrix Diagonally Medium Solution.java 1337 The K Weakest Rows in a Matrix Easy Solution.java 1342 Number of Steps to Reduce a Number to Zero Easy Solution.java 1347 Minimum Number of Steps to Make Two Strings Anagram Medium Solution.java 1351 Count Negative Numbers in a Sorted Matrix Easy Solution.java 1365 How Many Numbers Are Smaller Than the Current Number Easy Solution.java 1370 Increasing Decreasing String Easy Solution.java 1374 Generate a String With Characters That Have Odd Counts Easy Solution.java 1379 Find a Corresponding Node of a Binary Tree in a Clone of That Tree Medium Solution.java 1380 Lucky Numbers in a Matrix Easy Solution.java 1382 Balance a Binary Search Tree Medium Solution.java 1389 Create Target Array in the Given Order Easy Solution.java 1395 Count Number of Teams Medium Solution.java 1408 String Matching in an Array Easy Solution.java 1409 Queries on a Permutation With Key Medium Solution.java 1447 Simplified Fractions Medium Solution.java 1450 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