| 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 | | |
| 287. Find the Duplicate Number | 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 | | |
| 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 | | |
| 525. Contiguous Array | 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 | | |
| 694. Number of Distinct Islands | Solution | Solve | Medium | | |
| 713. Subarray Product Less Than K | Solution | Solve | Medium | | |
| 735. Asteroid Collision | Solution | Solve | Medium | | |
| 739. Daily Temperatures | Solution | Solve | Medium | | |
| 787. Cheapest Flights Within K Stops | Solution | Solve | Medium | | |
| 870. Advantage Shuffle | 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 | | |
| 2406. Divide Intervals Into Minimum Number of Groups | Solution | Solve | Medium | | |
| 2461. Maximum Sum of Distinct Subarrays With Length K | Solution | Solve | Medium | | |
| 2541. Minimum Operations to Make Array Equal II | Solution | Solve | Medium | | |
| 3179. Find the N-th Value After K Seconds | Solution | Solve | Medium | | |
