| 42. Trapping Rain Water | | | Solve | Hard | | |
| 56. Merge Intervals | | | Solve | Medium | | |
| 62. Unique Paths | | | Solve | Medium | | |
| 67. Add Binary | | | Solve | Easy | | |
| 68. Text Justification | | | Solve | Hard | | |
| 76. Minimum Window Substring | | | Solve | Hard | | |
| 79. Word Search | | | Solve | Medium | | |
| 118. Pascal's Triangle | | | Solve | Easy | | |
| 124. Binary Tree Maximum Path Sum | | | Solve | Hard | | |
| 126. Word Ladder II | | | Solve | Hard | | |
| 127. Word Ladder | | | Solve | Hard | | |
| 140. Word Break II | | | Solve | Hard | | |
| 146. LRU Cache | | | Solve | Medium | | |
| 162. Find Peak Element | | | Solve | Medium | | |
| 200. Number of Islands | | | Solve | Medium | | |
| 208. Implement Trie (Prefix Tree) | | | Solve | Medium | | |
| 212. Word Search II | | | Solve | Hard | | |
| 224. Basic Calculator | | | Solve | Hard | | |
| 227. Basic Calculator II | | | Solve | Medium | | |
| 231. Power of Two | | | Solve | Easy | | |
| 241. Different Ways to Add Parentheses | | | Solve | Medium | | |
| 253. Meeting Rooms II | | | Solve | Medium | | |
| 269. Alien Dictionary | | | Solve | Hard | | |
| 289. Game of Life | | | Solve | Medium | | |
| 310. Minimum Height Trees | | | Solve | Medium | | |
| 311. Sparse Matrix Multiplication | | | Solve | Medium | | |
| 329. Longest Increasing Path in a Matrix | | | Solve | Hard | | |
| 351. Android Unlock Patterns | | | Solve | Medium | | |
| 377. Combination Sum IV | | | Solve | Medium | | |
| 394. Decode String | | | Solve | Medium | | |
| 399. Evaluate Division | | | Solve | Medium | | |
| 403. Frog Jump | | | Solve | Hard | | |
| 439. Ternary Expression Parser | | | Solve | Medium | | |
| 460. LFU Cache | | | Solve | Hard | | |
| 486. Predict the Winner | | | Solve | Medium | | |
| 490. The Maze | | | Solve | Medium | | |
| 527. Word Abbreviation | | | Solve | Hard | | |
| 557. Reverse Words in a String III | | | Solve | Easy | | |
| 632. Smallest Range Covering Elements from K Lists | | | Solve | Hard | | |
| 642. Design Search Autocomplete System | | | Solve | Hard | | |
| 772. Basic Calculator III | | | Solve | Hard | | |
| 787. Cheapest Flights Within K Stops | | | Solve | Medium | | |
| 871. Minimum Number of Refueling Stops | | | Solve | Hard | | |
| 935. Knight Dialer | | | Solve | Medium | | |
| 939. Minimum Area Rectangle | | | Solve | Medium | | |
| 964. Least Operators to Express Number | | | Solve | Hard | | |
| 974. Subarray Sums Divisible by K | | | Solve | Medium | | |
| 1091. Shortest Path in Binary Matrix | | | Solve | Medium | | |
| 1231. Divide Chocolate | | | Solve | Hard | | |
| 1249. Minimum Remove to Make Valid Parentheses | | | Solve | Medium | | |
