| 451. Sort Characters By Frequency | Solution | Solve | Medium | | |
| 460. LFU Cache | Solution | Solve | Hard | | |
| 490. The Maze | Solution | Solve | Medium | | |
| 498. Diagonal Traverse | Solution | Solve | Medium | | |
| 503. Next Greater Element II | Solution | Solve | Medium | | |
| 525. Contiguous Array | Solution | Solve | Medium | | |
| 543. Diameter of Binary Tree | Solution | Solve | Easy | | |
| 545. Boundary of Binary Tree | Solution | Solve | Medium | | |
| 556. Next Greater Element III | Solution | Solve | Medium | | |
| 560. Subarray Sum Equals K | Solution | Solve | Medium | | |
| 567. Permutation in String | Solution | Solve | Medium | | |
| 647. Palindromic Substrings | Solution | Solve | Medium | | |
| 665. Non-decreasing Array | Solution | Solve | Medium | | |
| 692. Top K Frequent Words | Solution | Solve | Medium | | |
| 694. Number of Distinct Islands | Solution | Solve | Medium | | |
| 697. Degree of an Array | Solution | Solve | Easy | | |
| 716. Max Stack | Solution | Solve | Hard | | |
| 730. Count Different Palindromic Subsequences | Solution | Solve | Hard | | |
| 735. Asteroid Collision | Solution | Solve | Medium | | |
| 739. Daily Temperatures | Solution | Solve | Medium | | |
| 841. Keys and Rooms | Solution | Solve | Medium | | |
| 875. Koko Eating Bananas | Solution | Solve | Medium | | |
| 876. Middle of the Linked List | Solution | Solve | Easy | | |
| 881. Boats to Save People | Solution | Solve | Medium | | |
| 912. Sort an Array | Solution | Solve | Medium | | |
| 994. Rotting Oranges | Solution | Solve | Medium | | |
| 1011. Capacity To Ship Packages Within D Days | Solution | Solve | Medium | | |
| 1122. Relative Sort Array | Solution | Solve | Easy | | |
| 1143. Longest Common Subsequence | Solution | Solve | Medium | | |
| 1209. Remove All Adjacent Duplicates in String II | Solution | Solve | Medium | | |
| 1238. Circular Permutation in Binary Representation | Solution | Solve | Medium | | |
| 1249. Minimum Remove to Make Valid Parentheses | Solution | Solve | Medium | | |
| 1329. Sort the Matrix Diagonally | Solution | Solve | Medium | | |
| 1486. XOR Operation in an Array | Solution | Solve | Easy | | |
| 1642. Furthest Building You Can Reach | Solution | Solve | Medium | | |
| 1823. Find the Winner of the Circular Game | Solution | Solve | Medium | | |
| 1926. Nearest Exit from Entrance in Maze | Solution | Solve | Medium | | |
| 1977. Number of Ways to Separate Numbers | Solution | Solve | Hard | | |
| 2071. Maximum Number of Tasks You Can Assign | Solution | Solve | Hard | | |
| 2072. The Winner University | Solution | Solve | Easy | | |
| 2179. Count Good Triplets in an Array | Solution | Solve | Hard | | |
| 2402. Meeting Rooms III | Solution | Solve | Hard | | |
| 2406. Divide Intervals Into Minimum Number of Groups | Solution | Solve | Medium | | |
| 2423. Remove Letter To Equalize Frequency | Solution | Solve | Easy | | |
| 2449. Minimum Number of Operations to Make Arrays Similar | Solution | Solve | Hard | | |
| 2461. Maximum Sum of Distinct Subarrays With Length K | Solution | Solve | Medium | | |
| 2541. Minimum Operations to Make Array Equal II | Solution | Solve | Medium | | |
| 2625. Flatten Deeply Nested Array | Solution | Solve | Medium | | |
| 3005. Count Elements With Maximum Frequency | Solution | Solve | Easy | | |
| 3090. Maximum Length Substring With Two Occurrences | Solution | Solve | Easy | | |
