| Check if an Original String Exists Given Two Encoded Strings | Hard | 43.5% | 100.0% | StringDynamic Programming |
| Gas Station | Medium | 47.5% | 91.9% | ArrayGreedy |
| Number of Islands | Medium | 63.8% | 84.2% | ArrayDepth-First SearchBreadth-First Search+2 |
| LRU Cache | Medium | 46.8% | 84.2% | Hash TableLinked ListDesign+1 |
| Bus Routes | Hard | 47.1% | 72.6% | ArrayHash TableBreadth-First Search |
| Longest Palindromic Substring | Medium | 37.4% | 72.6% | Two PointersStringDynamic Programming |
| Trapping Rain Water | Hard | 66.8% | 63.4% | ArrayTwo PointersDynamic Programming+2 |
| Course Schedule | Medium | 50.8% | 63.4% | Depth-First SearchBreadth-First SearchGraph Theory+1 |
| Lowest Common Ancestor of a Binary Tree | Medium | 68.8% | 63.4% | TreeDepth-First SearchBinary Tree |
| Subarray Sum Equals K | Medium | 46.8% | 63.4% | ArrayHash TablePrefix Sum |
| Largest Rectangle in Histogram | Hard | 49.4% | 63.4% | ArrayStackMonotonic Stack |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 63.4% | Hash TableStringSliding Window |
| Longest Substring with At Most K Distinct Characters | Medium | 49.9% | 63.4% | Hash TableStringSliding Window |
| Vertical Order Traversal of a Binary Tree | Hard | 53.3% | 63.4% | Hash TableTreeDepth-First Search+3 |
| Longest Consecutive Sequence | Medium | 47.0% | 63.4% | ArrayHash TableUnion-Find |