| 3. Longest Substring Without Repeating Characters | Solution | Solve | Medium | | |
| 31. Next Permutation | Solution | Solve | Medium | | |
| 34. Find First and Last Position of Element in Sorted Array | Solution | Solve | Medium | | |
| 45. Jump Game II | Solution | Solve | Medium | | |
| 49. Group Anagrams | Solution | Solve | Medium | | |
| 53. Maximum Subarray | Solution | Solve | Medium | | |
| 56. Merge Intervals | Solution | Solve | Medium | | |
| 79. Word Search | Solution | Solve | Medium | | |
| 128. Longest Consecutive Sequence | Solution | Solve | Medium | | |
| 146. LRU Cache | Solution | Solve | Medium | | |
| 177. Nth Highest Salary | Solution | Solve | Medium | | |
| 211. Design Add and Search Words Data Structure | Solution | Solve | Medium | | |
| 229. Majority Element II | Solution | Solve | Medium | | |
| 236. Lowest Common Ancestor of a Binary Tree | Solution | Solve | Medium | | |
| 253. Meeting Rooms II | Solution | Solve | Medium | | |
| 300. Longest Increasing Subsequence | Solution | Solve | Medium | | |
| 347. Top K Frequent Elements | Solution | Solve | Medium | | |
| 353. Design Snake Game | Solution | Solve | Medium | | |
| 362. Design Hit Counter | Solution | Solve | Medium | | |
| 658. Find K Closest Elements | Solution | Solve | Medium | | |
| 875. Koko Eating Bananas | Solution | Solve | Medium | | |
| 881. Boats to Save People | Solution | Solve | Medium | | |
| 911. Online Election | Solution | Solve | Medium | | |
| 1010. Pairs of Songs With Total Durations Divisible by 60 | Solution | Solve | Medium | | |
| 1048. Longest String Chain | Solution | Solve | Medium | | |
| 1166. Design File System | Solution | Solve | Medium | | |
| 1366. Rank Teams by Votes | Solution | Solve | Medium | | |
| 1644. Lowest Common Ancestor of a Binary Tree II | Solution | Solve | Medium | | |
| 1650. Lowest Common Ancestor of a Binary Tree III | Solution | Solve | Medium | | |
| 1676. Lowest Common Ancestor of a Binary Tree IV | Solution | Solve | Medium | | |
| 1797. Design Authentication Manager | Solution | Solve | Medium | | |
| 2034. Stock Price Fluctuation | Solution | Solve | Medium | | |
| 2039. The Time When the Network Becomes Idle | Solution | Solve | Medium | | |
| 2353. Design a Food Rating System | Solution | Solve | Medium | | |
| 2559. Count Vowel Strings in Ranges | Solution | Solve | Medium | | |
| 2598. Smallest Missing Non-negative Integer After Operations | Solution | Solve | Medium | | |
| 2933. High-Access Employees | Solution | Solve | Medium | | |
| 2939. Maximum Xor Product | Solution | Solve | Medium | | |
| 2948. Make Lexicographically Smallest Array by Swapping Elements | Solution | Solve | Medium | | |
| 2975. Maximum Square Area by Removing Fences From a Field | Solution | Solve | Medium | | |
| 2976. Minimum Cost to Convert String I | Solution | Solve | Medium | | |
| 3026. Maximum Good Subarray Sum | Solution | Solve | Medium | | |
| 3649. Number of Perfect Pairs | Solution | Solve | Medium | | |
