| 101Non-overlapping Intervals | | Medium | Solve→ |
| 102Meeting Rooms II | | Medium | Solve→ |
| 103Jump Game | | Medium | Solve→ |
| 104Partition Labels | | Medium | Solve→ |
| 105House Robber | | Medium | Solve→ |
| 106Unique Paths | | Medium | Solve→ |
| 107Longest Increasing Subsequence | | Medium | Solve→ |
| 108Longest Common Subsequence | | Medium | Solve→ |
| 109Word Break | | Medium | Solve→ |
| 110Decode Ways | | Medium | Solve→ |
| 111Partition Equal Subset Sum | | Medium | Solve→ |
| 112Longest Palindromic Substring | | Medium | Solve→ |
| 113Subsets | | Medium | Solve→ |
| 114Permutations | | Medium | Solve→ |
| 115Combination Sum | | Medium | Solve→ |
| 116Generate Parentheses | | Medium | Solve→ |
| 117Letter Combinations of a Phone Number | | Medium | Solve→ |
| 118Word Search | | Medium | Solve→ |
| 119Rotting Oranges | | Medium | Solve→ |
| 120Course Schedule | | Medium | Solve→ |
| 121Number of Provinces | | Medium | Solve→ |
| 122Network Delay Time | | Medium | Solve→ |
| 123Kth Largest Element in an Array | | Medium | Solve→ |
| 124Binary Tree Level Order Traversal | | Medium | Solve→ |
| 125Validate Binary Search Tree | | Medium | Solve→ |
| 126Lowest Common Ancestor of a BST | | Medium | Solve→ |
| 127Implement Trie (Prefix Tree) | | Medium | Solve→ |
| 128Find the Duplicate Number | | Medium | Solve→ |
| 129Remove Nth Node From End of List | | Medium | Solve→ |
| 130Spiral Matrix | | Medium | Solve→ |
| 131Maximum Subarray | | Medium | Solve→ |
| 132Longest Substring Without Repeating Characters | | Medium | Solve→ |
| 133Merge Intervals | | Medium | Solve→ |
| 134Number of Islands | | Medium | Solve→ |
| 135Coin Change | | Medium | Solve→ |
| 136Trapping Rain Water | | Hard | Solve→ |
| 137Largest Rectangle in Histogram | | Hard | Solve→ |
| 138Sliding Window Maximum | | Hard | Solve→ |
| 139Minimum Window Substring | | Hard | Solve→ |
| 140Split Array Largest Sum | | Hard | Solve→ |
| 141Merge k Sorted Lists | | Hard | Solve→ |
| 142Word Ladder | | Hard | Solve→ |
| 143N-Queens II | | Hard | Solve→ |
| 144Edit Distance | | Hard | Solve→ |
| 145Regular Expression Matching | | Hard | Solve→ |
| 146Longest Valid Parentheses | | Hard | Solve→ |
| 147Burst Balloons | | Hard | Solve→ |
| 148Alien Dictionary | | Hard | Solve→ |
| 149Swim in Rising Water | | Hard | Solve→ |
| 150Longest Increasing Path in a Matrix | | Hard | Solve→ |