| Merge k Sorted Lists | Hard | 58.9% | 66.7% |
| Trapping Rain Water | Hard | 66.8% | 65.7% |
| Median of Two Sorted Arrays | Hard | 46.0% | 63.4% |
| Find Median from Data Stream | Hard | 54.2% | 60.9% |
| Word Ladder | Hard | 44.9% | 59.5% |
| Max Points on a Line | Hard | 30.3% | 54.7% |
| Number of Squareful Arrays | Hard | 51.2% | 54.7% |
| Find Servers That Handled Most Number of Requests | Hard | 45.2% | 52.8% |
| Regular Expression Matching | Hard | 30.5% | 52.8% |
| Count the Number of Incremovable Subarrays II | Hard | 40.1% | 52.8% |
| Serialize and Deserialize Binary Tree | Hard | 60.4% | 50.7% |
| Integer to English Words | Hard | 34.8% | 45.7% |
| Text Justification | Hard | 50.5% | 45.7% |
| Sliding Window Maximum | Hard | 48.5% | 42.6% |
| Serialize and Deserialize N-ary Tree | Hard | 68.6% | 39.0% |
| LFU Cache | Hard | 48.6% | 39.0% |
| Maximum Frequency Stack | Hard | 66.6% | 39.0% |
| Binary Tree Maximum Path Sum | Hard | 42.0% | 34.7% |
| Best Time to Buy and Sell Stock IV | Hard | 49.5% | 34.7% |
| Alien Dictionary | Hard | 37.1% | 34.7% |
| Maximum Path Quality of a Graph | Hard | 61.7% | 34.7% |
| Best Time to Buy and Sell Stock III | Hard | 53.2% | 34.7% |
| Largest Rectangle in Histogram | Hard | 49.4% | 29.1% |
| The Skyline Problem | Hard | 45.0% | 29.1% |
| Employee Free Time | Hard | 72.8% | 29.1% |
| Word Ladder II | Hard | 27.5% | 29.1% |
| Read N Characters Given read4 II - Call Multiple Times | Hard | 43.2% | 29.1% |
| Sudoku Solver | Hard | 65.4% | 29.1% |
| Basic Calculator | Hard | 46.6% | 29.1% |
| Reconstruct Itinerary | Hard | 44.3% | 29.1% |
| Longest Increasing Path in a Matrix | Hard | 56.3% | 29.1% |
| Paths in Matrix Whose Sum Is Divisible by K | Hard | 58.7% | 29.1% |
| All O`one Data Structure | Hard | 44.2% | 21.7% |
| Parse Lisp Expression | Hard | 53.5% | 21.7% |
| First Missing Positive | Hard | 42.5% | 21.7% |
| Minimum Window Substring | Hard | 47.0% | 21.7% |
| Reverse Pairs | Hard | 33.7% | 21.7% |
| Similar String Groups | Hard | 56.1% | 21.7% |
| Shortest Distance from All Buildings | Hard | 44.9% | 21.7% |
| Guess the Word | Hard | 36.9% | 21.7% |
| Sliding Window Median | Hard | 38.9% | 21.7% |
| Optimize Water Distribution in a Village | Hard | 65.5% | 21.7% |
| Reverse Nodes in k-Group | Hard | 65.4% | 21.7% |
| Substring with Concatenation of All Words | Hard | 34.0% | 21.7% |
| Word Search II | Hard | 38.1% | 21.7% |
| Longest Happy Prefix | Hard | 51.9% | 21.7% |
