| 1. Two Sum | | | Solve | Easy | | |
| 3. Longest Substring Without Repeating Characters | | | Solve | Medium | | |
| 4. Median of Two Sorted Arrays | | | Solve | Hard | | |
| 5. Longest Palindromic Substring | | | Solve | Medium | | |
| 7. Reverse Integer | | | Solve | Medium | | |
| 33. Search in Rotated Sorted Array | | | Solve | Medium | | |
| 53. Maximum Subarray | | | Solve | Medium | | |
| 74. Search a 2D Matrix | | | Solve | Medium | | |
| 86. Partition List | | | Solve | Medium | | |
| 92. Reverse Linked List II | | | Solve | Medium | | |
| 118. Pascal's Triangle | | | Solve | Easy | | |
| 141. Linked List Cycle | | | Solve | Easy | 42gearMobilitySystems+131 | |
| 143. Reorder List | | | Solve | Medium | | |
| 168. Excel Sheet Column Title | | | Solve | Easy | | |
| 200. Number of Islands | | | Solve | Medium | | |
| 215. Kth Largest Element in an Array | | | Solve | Medium | | |
| 225. Implement Stack using Queues | | | Solve | Easy | | |
| 239. Sliding Window Maximum | | | Solve | Hard | | |
| 295. Find Median from Data Stream | | | Solve | Hard | | |
| 300. Longest Increasing Subsequence | | | Solve | Medium | | |
| 304. Range Sum Query 2D - Immutable | | | Solve | Medium | | |
| 329. Longest Increasing Path in a Matrix | | | Solve | Hard | | |
| 338. Counting Bits | | | Solve | Easy | | |
| 435. Non-overlapping Intervals | | | Solve | Medium | | |
| 445. Add Two Numbers II | | | Solve | Medium | | |
| 503. Next Greater Element II | | | Solve | Medium | | |
| 515. Find Largest Value in Each Tree Row | | | Solve | Medium | | |
| 518. Coin Change II | | | Solve | Medium | | |
| 530. Minimum Absolute Difference in BST | | | Solve | Easy | | |
| 547. Number of Provinces | | | Solve | Medium | | |
| 557. Reverse Words in a String III | | | Solve | Easy | | |
| 673. Number of Longest Increasing Subsequence | | | Solve | Medium | | |
| 706. Design HashMap | | | Solve | Easy | | |
| 783. Minimum Distance Between BST Nodes | | | Solve | Easy | | |
| 785. Is Graph Bipartite? | | | Solve | Medium | | |
| 799. Champagne Tower | | | Solve | Medium | | |
| 863. All Nodes Distance K in Binary Tree | | | Solve | Medium | | |
| 1091. Shortest Path in Binary Matrix | | | Solve | Medium | | |
| 1139. Largest 1-Bordered Square | | | Solve | Medium | | |
| 1228. Missing Number In Arithmetic Progression | | | Solve | Easy | | |
| 1301. Number of Paths with Max Score | | | Solve | Hard | | |
| 1312. Minimum Insertion Steps to Make a String Palindrome | | | Solve | Hard | | |
| 1441. Build an Array With Stack Operations | | | Solve | Medium | | |
| 1464. Maximum Product of Two Elements in an Array | | | Solve | Easy | | |
| 1519. Number of Nodes in the Sub-Tree With the Same Label | | | Solve | Medium | | |
| 1631. Path With Minimum Effort | | | Solve | Medium | | |
| 1691. Maximum Height by Stacking Cuboids | | | Solve | Hard | | |
| 1830. Minimum Number of Operations to Make String Sorted | | | Solve | Hard | | |
| 2029. Stone Game IX | | | Solve | Medium | | |
| 2035. Partition Array Into Two Arrays to Minimize Sum Difference | | | Solve | Hard | | |