| 31. Next Permutation | | | Solve | Medium | | |
| 37. Sudoku Solver | | | Solve | Hard | | |
| 45. Jump Game II | | | Solve | Medium | | |
| 55. Jump Game | | | Solve | Medium | | |
| 84. Largest Rectangle in Histogram | | | Solve | Hard | | |
| 124. Binary Tree Maximum Path Sum | | | Solve | Hard | | |
| 199. Binary Tree Right Side View | | | Solve | Medium | | |
| 200. Number of Islands | | | Solve | Medium | | |
| 211. Design Add and Search Words Data Structure | | | Solve | Medium | | |
| 224. Basic Calculator | | | Solve | Hard | | |
| 239. Sliding Window Maximum | | | Solve | Hard | | |
| 273. Integer to English Words | | | Solve | Hard | | |
| 286. Walls and Gates | | | Solve | Medium | | |
| 295. Find Median from Data Stream | | | Solve | Hard | | |
| 297. Serialize and Deserialize Binary Tree | | | Solve | Hard | | |
| 317. Shortest Distance from All Buildings | | | Solve | Hard | | |
| 329. Longest Increasing Path in a Matrix | | | Solve | Hard | | |
| 428. Serialize and Deserialize N-ary Tree | | | Solve | Hard | | |
| 437. Path Sum III | | | Solve | Medium | | |
| 532. K-diff Pairs in an Array | | | Solve | Medium | | |
| 556. Next Greater Element III | | | Solve | Medium | | |
| 560. Subarray Sum Equals K | | | Solve | Medium | | |
| 588. Design In-Memory File System | | | Solve | Hard | | |
| 636. Exclusive Time of Functions | | | Solve | Medium | | |
| 694. Number of Distinct Islands | | | Solve | Medium | | |
| 735. Asteroid Collision | | | Solve | Medium | | |
| 759. Employee Free Time | | | Solve | Hard | | |
| 772. Basic Calculator III | | | Solve | Hard | | |
| 778. Swim in Rising Water | | | Solve | Hard | | |
| 826. Most Profit Assigning Work | | | Solve | Medium | | |
| 827. Making A Large Island | | | Solve | Hard | | |
| 854. K-Similar Strings | | | Solve | Hard | | |
| 859. Buddy Strings | | | Solve | Easy | | |
| 886. Possible Bipartition | | | Solve | Medium | | |
| 986. Interval List Intersections | | | Solve | Medium | | |
| 1011. Capacity To Ship Packages Within D Days | | | Solve | Medium | | |
| 1094. Car Pooling | | | Solve | Medium | | |
| 1102. Path With Maximum Minimum Value | | | Solve | Medium | | |
| 1143. Longest Common Subsequence | | | Solve | Medium | | |
| 1167. Minimum Cost to Connect Sticks | | | Solve | Medium | | |
| 1173. Immediate Food Delivery I | | | Solve | Easy | | |
| 1174. Immediate Food Delivery II | | | Solve | Medium | | |
| 1235. Maximum Profit in Job Scheduling | | | Solve | Hard | | |
| 1293. Shortest Path in a Grid with Obstacles Elimination | | | Solve | Hard | | |
| 1347. Minimum Number of Steps to Make Two Strings Anagram | | | Solve | Medium | | |
| 1359. Count All Valid Pickup and Delivery Options | | | Solve | Hard | | |
| 1522. Diameter of N-Ary Tree | | | Solve | Medium | | |
| 1730. Shortest Path to Get Food | | | Solve | Medium | | |
| 1779. Find Nearest Point That Has the Same X or Y Coordinate | | | Solve | Easy | | |
| 1905. Count Sub Islands | | | Solve | Medium | | |
