| 3. Longest Substring Without Repeating Characters | Solution | Solve | Medium | | |
| 10. Regular Expression Matching | Solution | Solve | Hard | | |
| 32. Longest Valid Parentheses | Solution | Solve | Hard | | |
| 41. First Missing Positive | Solution | Solve | Hard | | |
| 42. Trapping Rain Water | Solution | Solve | Hard | | |
| 85. Maximal Rectangle | Solution | Solve | Hard | | |
| 121. Best Time to Buy and Sell Stock | Solution | Solve | Easy | | |
| 146. LRU Cache | Solution | Solve | Medium | | |
| 149. Max Points on a Line | Solution | Solve | Hard | | |
| 205. Isomorphic Strings | Solution | Solve | Easy | | |
| 239. Sliding Window Maximum | Solution | Solve | Hard | | |
| 295. Find Median from Data Stream | Solution | Solve | Hard | | |
| 297. Serialize and Deserialize Binary Tree | Solution | Solve | Hard | | |
| 337. House Robber III | Solution | Solve | Medium | | |
| 403. Frog Jump | Solution | Solve | Hard | | |
| 456. 132 Pattern | Solution | Solve | Medium | | |
| 546. Remove Boxes | Solution | Solve | Hard | | |
| 552. Student Attendance Record II | Solution | Solve | Hard | | |
| 560. Subarray Sum Equals K | Solution | Solve | Medium | | |
| 687. Longest Univalue Path | Solution | Solve | Medium | | |
| 735. Asteroid Collision | Solution | Solve | Medium | | |
| 907. Sum of Subarray Minimums | Solution | Solve | Medium | | |
| 918. Maximum Sum Circular Subarray | Solution | Solve | Medium | | |
| 946. Validate Stack Sequences | Solution | Solve | Medium | | |
| 975. Odd Even Jump | Solution | Solve | Hard | | |
| 1129. Shortest Path with Alternating Colors | Solution | Solve | Medium | | |
| 1463. Cherry Pickup II | Solution | Solve | Hard | | |
| 1746. Maximum Subarray Sum After One Operation | Solution | Solve | Medium | | |
| 1755. Closest Subsequence Sum | Solution | Solve | Hard | | |
| 1799. Maximize Score After N Operations | Solution | Solve | Hard | | |
| 2048. Next Greater Numerically Balanced Number | Solution | Solve | Medium | | |
| 2378. Choose Edges to Maximize Score in a Tree | Solution | Solve | Medium | | |
| 2440. Create Components With Same Value | Solution | Solve | Hard | | |
| 2518. Number of Great Partitions | Solution | Solve | Hard | | |
| 2546. Apply Bitwise Operations to Make Strings Equal | Solution | Solve | Medium | | |
| 2846. Minimum Edge Weight Equilibrium Queries in a Tree | Solution | Solve | Hard | | |
| 2897. Apply Operations on Array to Maximize Sum of Squares | Solution | Solve | Hard | | |
| 2955. Number of Same-End Substrings | Solution | Solve | Medium | | |
| 2999. Count the Number of Powerful Integers | Solution | Solve | Hard | | |
| 3029. Minimum Time to Revert Word to Initial State I | Solution | Solve | Medium | | |
| 3031. Minimum Time to Revert Word to Initial State II | Solution | Solve | Hard | | |
| 3414. Maximum Score of Non-overlapping Intervals | Solution | Solve | Hard | | |
