| Find Words Containing Character | Easy | 90.4% | 100.0% | ArrayString |
| Design Authentication Manager | Medium | 58.4% | 87.5% | Hash TableLinked ListDesign+1 |
| Search Suggestions System | Medium | 65.2% | 62.5% | ArrayStringBinary Search+3 |
| Vertical Order Traversal of a Binary Tree | Hard | 53.2% | 62.5% | Hash TableTreeDepth-First Search+3 |
| Count Number of Nice Subarrays | Medium | 74.8% | 62.5% | ArrayHash TableMath+2 |
| Remove Invalid Parentheses | Hard | 49.8% | 62.5% | StringBacktrackingBreadth-First Search |