| Two Sum | Easy | 57.1% | 100.0% | ArrayHash Table |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 87.5% | Hash TableStringSliding Window |
| Longest Palindromic Substring | Medium | 37.3% | 87.5% | Two PointersStringDynamic Programming |
| Find First and Last Position of Element in Sorted Array | Medium | 48.3% | 87.5% | ArrayBinary Search |
| Rotate Image | Medium | 79.3% | 87.5% | ArrayMathMatrix |
| Simplify Path | Medium | 50.0% | 87.5% | StringStack |
| Keys and Rooms | Medium | 75.5% | 87.5% | Depth-First SearchBreadth-First SearchGraph Theory |
| Min Stack | Medium | 57.7% | 87.5% | StackDesign |
| Battleships in a Board | Medium | 77.3% | 87.5% | ArrayDepth-First SearchMatrix |
| Event Emitter | Medium | 74.9% | 87.5% | |
| Search in Rotated Sorted Array | Medium | 44.1% | 87.5% | ArrayBinary Search |
| Number of Islands | Medium | 63.8% | 87.5% | ArrayDepth-First SearchBreadth-First Search+2 |
| Form Smallest Number From Two Digit Arrays | Easy | 55.0% | 87.5% | ArrayHash TableEnumeration |
| Find the Longest Balanced Substring of a Binary String | Easy | 46.4% | 87.5% | String |
| Is Subsequence | Easy | 48.8% | 75.0% | Two PointersStringDynamic Programming |
| Find All Numbers Disappeared in an Array | Easy | 63.7% | 75.0% | ArrayHash Table |
| Decode String | Medium | 62.2% | 75.0% | StringStackRecursion |
| Minimum Difference Between Highest and Lowest of K Scores | Easy | 66.2% | 75.0% | ArraySliding WindowSorting |
| Remove Nth Node From End of List | Medium | 51.0% | 75.0% | Linked ListTwo Pointers |
| Search a 2D Matrix | Medium | 53.5% | 62.5% | ArrayBinary SearchMatrix |
| Backspace String Compare | Easy | 49.8% | 62.5% | Two PointersStringStack+1 |
| Count Square Submatrices with All Ones | Medium | 80.7% | 62.5% | ArrayDynamic ProgrammingMatrix |
| Department Highest Salary | Medium | 57.3% | 62.5% | Database |
| Isomorphic Strings | Easy | 48.0% | 62.5% | Hash TableString |
| Subarray Sum Equals K | Medium | 46.8% | 62.5% | ArrayHash TablePrefix Sum |
| Valid Palindrome | Easy | 52.8% | 62.5% | Two PointersString |
| String Compression | Medium | 59.5% | 62.5% | Two PointersString |