| 218 | The Skyline Problem | Hard |
| 307 | Range Sum Query - Mutable | Medium |
| 315 | Count of Smaller Numbers After Self | Hard |
| 406 | Queue Reconstruction by Height | Medium |
| 493 | Reverse Pairs | Hard |
| 673 | Number of Longest Increasing Subsequence | Medium |
| 1157 | Online Majority Element In Subarray | Hard |
| 1395 | Count Number of Teams | Medium |
| 1409 | Queries on a Permutation With Key | Medium |
| 1505 | Minimum Possible Integer After at Most K Adjacent Swaps On Digits | Hard |
| 1649 | Create Sorted Array through Instructions | Hard |
| 1964 | Find the Longest Valid Obstacle Course at Each Position | Hard |
| 2179 | Count Good Triplets in an Array | Hard |
| 2193 | Minimum Number of Moves to Make Palindrome | Hard |
| 2250 | Count Number of Rectangles Containing Each Point | Medium |
| 2286 | Booking Concert Tickets in Groups | Hard |
| 2552 | Count Increasing Quadruplets | Hard |
| 2617 | Minimum Number of Visited Cells in a Grid | Hard |
| 2659 | Make Array Empty | Hard |
| 2736 | Maximum Sum Queries | Hard |