| 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 |
| 699 | Falling Squares | Hard |
| 715 | Range Module | Hard |
| 731 | My Calendar II | Medium |
| 732 | My Calendar III | Hard |
| 850 | Rectangle Area II | Hard |
| 1157 | Online Majority Element In Subarray | Hard |
| 1505 | Minimum Possible Integer After at Most K Adjacent Swaps On Digits | Hard |
| 1521 | Find a Value of a Mysterious Function Closest to Target | Hard |
| 1622 | Fancy Sequence | Hard |
| 1649 | Create Sorted Array through Instructions | Hard |
| 1687 | Delivering Boxes from Storage to Ports | Hard |
| 2080 | Range Frequency Queries | Medium |
| 2179 | Count Good Triplets in an Array | Hard |
| 2213 | Longest Substring of One Repeating Character | Hard |
| 2276 | Count Integers in Intervals | Hard |
| 2286 | Booking Concert Tickets in Groups | Hard |
| 2617 | Minimum Number of Visited Cells in a Grid | Hard |
| 2659 | Make Array Empty | Hard |
| 2736 | Maximum Sum Queries | Hard |