| 199. Binary Tree Right Side View | Solution | Solve | Medium | | |
| 200. Number of Islands | Solution | Solve | Medium | | |
| 207. Course Schedule | Solution | Solve | Medium | | |
| 210. Course Schedule II | Solution | Solve | Medium | | |
| 215. Kth Largest Element in an Array | Solution | Solve | Medium | | |
| 227. Basic Calculator II | Solution | Solve | Medium | | |
| 238. Product of Array Except Self | Solution | Solve | Medium | | |
| 253. Meeting Rooms II | Solution | Solve | Medium | | |
| 279. Perfect Squares | Solution | Solve | Medium | | |
| 300. Longest Increasing Subsequence | Solution | Solve | Medium | | |
| 322. Coin Change | Solution | Solve | Medium | | |
| 341. Flatten Nested List Iterator | Solution | Solve | Medium | | |
| 347. Top K Frequent Elements | Solution | Solve | Medium | | |
| 362. Design Hit Counter | Solution | Solve | Medium | | |
| 373. Find K Pairs with Smallest Sums | Solution | Solve | Medium | | |
| 394. Decode String | Solution | Solve | Medium | | |
| 395. Longest Substring with At Least K Repeating Characters | Solution | Solve | Medium | | |
| 402. Remove K Digits | Solution | Solve | Medium | | |
| 416. Partition Equal Subset Sum | Solution | Solve | Medium | | |
| 438. Find All Anagrams in a String | Solution | Solve | Medium | | |
| 442. Find All Duplicates in an Array | Solution | Solve | Medium | | |
| 451. Sort Characters By Frequency | Solution | Solve | Medium | | |
| 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 | | |
| 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 | | |
| 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 | | |
| 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 | | |
| 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 | | |
| 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 | | |
