- 0007. Reverse Integer
- 0008. String to Integer (atoi)
- 0009. Palindrome Number
- 0011. Container With Most Water
- 0012. Integer to Roman
- 0013. Roman to Integer
- 0014. Longest Common Prefix
- 0015. 3Sum
- 0016. 3Sum Closest
- 0017. Letter Combinations of a Phone Number
- 0018. 4Sum
- 0019. Remove Nth Node From End of List
- 0020. Valid Parentheses
- 0021. Merge Two Sorted Lists
- 0022. Generate Parentheses
- 0024. Swap Nodes in Pairs
- 0026. Remove Duplicates from Sorted Array
- 0027. Remove Element
- 0028. Implement strStr()
- 0029. Divide Two Integers
- 0031. Next Permutation
- 0033. Search in Rotated Sorted Array
- 0034. Find First and Last Position of Element in Sorted Array
- 0035. Search Insert Position
- 0036. Valid Sudoku
- 0038. Count and Say
- 0039. Combination Sum
- 0040. Combination Sum II
- 0043. Multiply Strings
- 0046. Permutations
- 0047. Permutations II
- 0048. Rotate Image
- 0049. group anagrams
- 0050. Pow(x, n)
- 0051. N-Queens
- 0053. Maximum Subarray
- 0054. Spiral Matrix
- 0055. Jump Game
- 0056. Merge Intervals
- 0058. Length of Last Word
- 0059. Spiral Matrix II
- 0060. Permutation Sequence
- 0061. Rotate List
- 0062. Unique Paths
- 0063. Unique Paths II
- 0064. Minimum Path Sum
- 0066. Plus One
- 0067. Add Binary
- 0069. Sqrt(x)
- 0070. Climbing Stairs
- 0071. Simplify Path
- 0073. Set Matrix Zeroes
- 0074. Search a 2D Matrix
- 0075. Sort Colors
- 0077. Combinations
- 0078. Subsets
- 0079. Word Search
- 0080. Remove Duplicates from Sorted Array II
- 0081. Search in Rotated Sorted Array II
- 0082. Remove Duplicates from Sorted List II
- 0083. Remove Duplicates from Sorted List
- 0086. Partition List
- 0088. Merge Sorted Array
- 0089. Gray Code
- 0090. Subsets II
- 0091. Decode Ways
- 0092. Reverse Linked List II
- 0093. Restore IP Addresses
- 0094. Binary Tree Inorder Traversal
- 0146. LRU Cache