| 36. Valid Sudoku | | | Solve | Medium | | |
| 37. Sudoku Solver | | | Solve | Hard | | |
| 48. Rotate Image | | | Solve | Medium | | |
| 54. Spiral Matrix | | | Solve | Medium | | |
| 59. Spiral Matrix II | | | Solve | Medium | | |
| 63. Unique Paths II | | | Solve | Medium | | |
| 64. Minimum Path Sum | | | Solve | Medium | | |
| 73. Set Matrix Zeroes | | | Solve | Medium | | |
| 74. Search a 2D Matrix | | | Solve | Medium | | |
| 79. Word Search | | | Solve | Medium | | |
| 85. Maximal Rectangle | | | Solve | Hard | | |
| 130. Surrounded Regions | | | Solve | Medium | | |
| 174. Dungeon Game | | | Solve | Hard | | |
| 200. Number of Islands | | | Solve | Medium | | |
| 212. Word Search II | | | Solve | Hard | | |
| 221. Maximal Square | | | Solve | Medium | | |
| 240. Search a 2D Matrix II | | | Solve | Medium | | |
| 286. Walls and Gates | | | Solve | Medium | | |
| 289. Game of Life | | | Solve | Medium | | |
| 296. Best Meeting Point | | | Solve | Hard | | |
| 302. Smallest Rectangle Enclosing Black Pixels | | | Solve | Hard | | |
| 304. Range Sum Query 2D - Immutable | | | Solve | Medium | | |
| 308. Range Sum Query 2D - Mutable | | | Solve | Medium | | |
| 311. Sparse Matrix Multiplication | | | Solve | Medium | | |
| 317. Shortest Distance from All Buildings | | | Solve | Hard | | |
| 329. Longest Increasing Path in a Matrix | | | Solve | Hard | | |
| 348. Design Tic-Tac-Toe | | | Solve | Medium | | |
| 361. Bomb Enemy | | | Solve | Medium | | |
| 363. Max Sum of Rectangle No Larger Than K | | | Solve | Hard | | |
| 378. Kth Smallest Element in a Sorted Matrix | | | Solve | Medium | | |
| 407. Trapping Rain Water II | | | Solve | Hard | | |
| 417. Pacific Atlantic Water Flow | | | Solve | Medium | | |
| 419. Battleships in a Board | | | Solve | Medium | | |
| 422. Valid Word Square | | | Solve | Easy | | |
| 427. Construct Quad Tree | | | Solve | Medium | | |
| 463. Island Perimeter | | | Solve | Easy | | |
| 490. The Maze | | | Solve | Medium | | |
| 498. Diagonal Traverse | | | Solve | Medium | | |
| 499. The Maze III | | | Solve | Hard | | |
| 505. The Maze II | | | Solve | Medium | | |
| 529. Minesweeper | | | Solve | Medium | | |
| 531. Lonely Pixel I | | | Solve | Medium | | |
| 533. Lonely Pixel II | | | Solve | Medium | | |
| 542. 01 Matrix | | | Solve | Medium | | |
| 562. Longest Line of Consecutive One in Matrix | | | Solve | Medium | | |
| 566. Reshape the Matrix | | | Solve | Easy | | |
| 568. Maximum Vacation Days | | | Solve | Hard | | |
| 631. Design Excel Sum Formula | | | Solve | Hard | | |
| 661. Image Smoother | | | Solve | Easy | | |
| 675. Cut Off Trees for Golf Event | | | Solve | Hard | | |
