| 3. Longest Substring Without Repeating Characters | Solution | Solve | Medium | | |
| 10. Regular Expression Matching | Solution | Solve | Hard | | |
| 11. Container With Most Water | Solution | Solve | Medium | | |
| 23. Merge k Sorted Lists | Solution | Solve | Hard | | |
| 44. Wildcard Matching | Solution | Solve | Hard | | |
| 49. Group Anagrams | Solution | Solve | Medium | | |
| 53. Maximum Subarray | Solution | Solve | Medium | | |
| 56. Merge Intervals | Solution | Solve | Medium | | |
| 62. Unique Paths | Solution | Solve | Medium | | |
| 78. Subsets | Solution | Solve | Medium | | |
| 84. Largest Rectangle in Histogram | Solution | Solve | Hard | | |
| 115. Distinct Subsequences | Solution | Solve | Hard | | |
| 131. Palindrome Partitioning | Solution | Solve | Medium | | |
| 139. Word Break | Solution | Solve | Medium | | |
| 146. LRU Cache | Solution | Solve | Medium | | |
| 200. Number of Islands | Solution | Solve | Medium | | |
| 207. Course Schedule | Solution | Solve | Medium | | |
| 215. Kth Largest Element in an Array | Solution | Solve | Medium | | |
| 224. Basic Calculator | Solution | Solve | Hard | | |
| 227. Basic Calculator II | Solution | Solve | Medium | | |
| 239. Sliding Window Maximum | Solution | Solve | Hard | | |
| 269. Alien Dictionary | Solution | Solve | Hard | | |
| 295. Find Median from Data Stream | Solution | Solve | Hard | | |
| 334. Increasing Triplet Subsequence | Solution | Solve | Medium | | |
| 340. Longest Substring with At Most K Distinct Characters | Solution | Solve | Medium | | |
| 355. Design Twitter | Solution | Solve | Medium | | |
| 362. Design Hit Counter | Solution | Solve | Medium | | |
| 380. Insert Delete GetRandom O(1) | Solution | Solve | Medium | | |
| 394. Decode String | Solution | Solve | Medium | | |
| 402. Remove K Digits | Solution | Solve | Medium | | |
| 460. LFU Cache | Solution | Solve | Hard | | |
| 528. Random Pick with Weight | Solution | Solve | Medium | | |
| 540. Single Element in a Sorted Array | Solution | Solve | Medium | | |
| 588. Design In-Memory File System | Solution | Solve | Hard | | |
| 621. Task Scheduler | Solution | Solve | Medium | | |
| 638. Shopping Offers | Solution | Solve | Medium | | |
| 658. Find K Closest Elements | Solution | Solve | Medium | | |
| 694. Number of Distinct Islands | Solution | Solve | Medium | | |
| 715. Range Module | Solution | Solve | Hard | | |
| 724. Find Pivot Index | Solution | Solve | Easy | | |
| 752. Open the Lock | Solution | Solve | Medium | | |
| 767. Reorganize String | Solution | Solve | Medium | | |
| 772. Basic Calculator III | Solution | Solve | Hard | | |
| 776. Split BST | Solution | Solve | Medium | | |
| 787. Cheapest Flights Within K Stops | Solution | Solve | Medium | | |
| 934. Shortest Bridge | Solution | Solve | Medium | | |
| 1044. Longest Duplicate Substring | Solution | Solve | Hard | | |
| 1062. Longest Repeating Substring | Solution | Solve | Medium | | |
| 1146. Snapshot Array | Solution | Solve | Medium | | |
| 1762. Buildings With an Ocean View | Solution | Solve | Medium | | |
