| Binary Tree Maximum Path Sum | Hard | 42.0% | 98.7% |
| Sliding Window Maximum | Hard | 48.5% | 85.3% |
| Count Palindromic Subsequences | Hard | 41.0% | 81.3% |
| LFU Cache | Hard | 48.6% | 79.8% |
| Minimum Operations to Make Numbers Non-positive | Hard | 44.1% | 78.1% |
| Best Position for a Service Centre | Hard | 35.1% | 74.4% |
| Minimum Costs Using the Train Line | Hard | 77.9% | 74.4% |
| Serialize and Deserialize Binary Tree | Hard | 60.4% | 67.4% |
| Parallel Courses III | Hard | 66.8% | 61.1% |
| Sudoku Solver | Hard | 65.4% | 61.1% |
| Employee Free Time | Hard | 72.8% | 57.1% |
| Couples Holding Hands | Hard | 59.2% | 57.1% |
| Robot Room Cleaner | Hard | 77.9% | 57.1% |
| Find Median from Data Stream | Hard | 54.2% | 57.1% |
| Merge k Sorted Lists | Hard | 58.9% | 57.1% |
| Trapping Rain Water | Hard | 66.8% | 52.2% |
| N-Queens | Hard | 75.0% | 52.2% |
| Design Search Autocomplete System | Hard | 49.7% | 52.2% |
| Regular Expression Matching | Hard | 30.5% | 52.2% |
| Best Time to Buy and Sell Stock III | Hard | 53.2% | 52.2% |
| Find Servers That Handled Most Number of Requests | Hard | 45.2% | 45.9% |
| Design Excel Sum Formula | Hard | 39.9% | 45.9% |
| Sort Items by Groups Respecting Dependencies | Hard | 65.6% | 45.9% |
| Median of Two Sorted Arrays | Hard | 46.0% | 45.9% |
| Alien Dictionary | Hard | 37.1% | 45.9% |
| Longest Increasing Path in a Matrix | Hard | 56.3% | 45.9% |
| Transform to Chessboard | Hard | 51.2% | 45.9% |
| Consecutive Numbers Sum | Hard | 42.6% | 38.9% |
| Insert Delete GetRandom O(1) - Duplicates allowed | Hard | 36.4% | 37.1% |
| Word Ladder II | Hard | 27.5% | 37.1% |
| Max Points on a Line | Hard | 30.3% | 37.1% |
| Rank Transform of a Matrix | Hard | 42.1% | 37.1% |
| The Skyline Problem | Hard | 45.0% | 37.1% |
| Bus Routes | Hard | 47.1% | 37.1% |
| Best Time to Buy and Sell Stock IV | Hard | 49.5% | 37.1% |
| Basic Calculator | Hard | 46.6% | 37.1% |
