| Unique Substrings in Wraparound String | Medium | 42.6% | 100.0% | StringDynamic Programming |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 75.0% | Hash TableStringSliding Window |
| Longest Palindromic Substring | Medium | 37.3% | 75.0% | Two PointersStringDynamic Programming |
| Largest Rectangle in Histogram | Hard | 49.3% | 62.5% | ArrayStackMonotonic Stack |
| Second Highest Salary | Medium | 46.3% | 62.5% | Database |
| Longest Palindromic Subsequence | Medium | 65.1% | 62.5% | StringDynamic Programming |
| Best Time to Buy and Sell Stock | Easy | 56.4% | 62.5% | ArrayDynamic Programming |
| Delete Duplicate Emails | Easy | 65.6% | 62.5% | Database |
| Longest Valid Parentheses | Hard | 38.0% | 62.5% | StringDynamic ProgrammingStack |