| Trapping Rain Water | Hard | 66.8% | 75.7% |
| Median of Two Sorted Arrays | Hard | 46.0% | 72.9% |
| Reverse Nodes in k-Group | Hard | 65.4% | 68.5% |
| Merge k Sorted Lists | Hard | 58.9% | 67.5% |
| Minimum Edge Reversals So Every Node Is Reachable | Hard | 57.3% | 59.7% |
| K-th Smallest in Lexicographical Order | Hard | 46.2% | 59.7% |
| Largest Rectangle in Histogram | Hard | 49.4% | 54.6% |
| First Missing Positive | Hard | 42.5% | 54.6% |
| Regular Expression Matching | Hard | 30.5% | 51.6% |
| N-Queens | Hard | 75.0% | 50.9% |
| Split Array Largest Sum | Hard | 59.9% | 50.3% |
| Sliding Window Maximum | Hard | 48.5% | 50.3% |
| Maximum Difference Between Even and Odd Frequency II | Hard | 48.7% | 50.3% |
| Sudoku Solver | Hard | 65.4% | 48.8% |
| Basic Calculator | Hard | 46.6% | 47.2% |
| Serialize and Deserialize Binary Tree | Hard | 60.4% | 47.2% |
| Word Ladder | Hard | 44.9% | 47.2% |
| Candy | Hard | 48.0% | 47.2% |
| Longest Valid Parentheses | Hard | 38.1% | 47.2% |
| Maximal Rectangle | Hard | 58.1% | 44.5% |
| Minimum Window Substring | Hard | 47.0% | 41.4% |
| Wildcard Matching | Hard | 31.4% | 39.0% |
| Text Justification | Hard | 50.5% | 37.7% |
| Find Median from Data Stream | Hard | 54.2% | 36.0% |
| Best Time to Buy and Sell Stock III | Hard | 53.2% | 36.0% |
| Binary Tree Maximum Path Sum | Hard | 42.0% | 30.3% |
| Substring with Concatenation of All Words | Hard | 34.0% | 26.7% |
| N-Queens II | Hard | 78.2% | 21.0% |
