| Two Sum | Easy | 57.1% | 100.0% | ArrayHash Table |
| Find First and Last Position of Element in Sorted Array | Medium | 48.4% | 95.1% | ArrayBinary Search |
| Number of Islands | Medium | 63.8% | 95.1% | ArrayDepth-First SearchBreadth-First Search+2 |
| Min Stack | Medium | 57.7% | 89.1% | StackDesign |
| Form Smallest Number From Two Digit Arrays | Easy | 55.0% | 89.1% | ArrayHash TableEnumeration |
| Find the Longest Balanced Substring of a Binary String | Easy | 46.4% | 89.1% | String |
| Decode String | Medium | 62.3% | 89.1% | StringStackRecursion |
| Minimum Difference Between Highest and Lowest of K Scores | Easy | 66.2% | 89.1% | ArraySliding WindowSorting |
| Event Emitter | Medium | 75.0% | 81.5% | |
| Is Subsequence | Easy | 48.9% | 81.5% | Two PointersStringDynamic Programming |
| Remove Nth Node From End of List | Medium | 51.0% | 81.5% | Linked ListTwo Pointers |
| Simplify Path | Medium | 50.0% | 81.5% | StringStack |
| Search in Rotated Sorted Array | Medium | 44.1% | 81.5% | ArrayBinary Search |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 70.6% | Hash TableStringSliding Window |
| Longest Palindromic Substring | Medium | 37.4% | 70.6% | Two PointersStringDynamic Programming |
| Find All Numbers Disappeared in an Array | Easy | 63.8% | 70.6% | ArrayHash Table |
| Valid Palindrome | Easy | 52.8% | 70.6% | Two PointersString |
| Battleships in a Board | Medium | 77.4% | 70.6% | ArrayDepth-First SearchMatrix |