Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 226 | Snakes and Ladders | Medium | ArrayBreadth-First SearchMatrix |
| 227 | Sort Matrix by Diagonals | Medium | ArraySortingMatrix |
| 228 | Sort the Matrix Diagonally | Medium | ArraySortingMatrix |
| 229 | Sort the Students by Their Kth Score | Medium | ArraySortingMatrix |
| 230 | Sparse Matrix Multiplication | Medium | ArrayHash TableMatrix |
| 231 | Special Positions in a Binary Matrix | Easy | ArrayMatrix |
| 232 | Spiral Matrix | Medium | ArrayMatrixSimulation |
| 233 | Spiral Matrix II | Medium | ArrayMatrixSimulation |
| 234 | Spiral Matrix III | Medium | ArrayMatrixSimulation |
| 235 | Spiral Matrix IV | Medium | ArrayLinked ListMatrix |
| 236 | Stamping the Grid | Hard | ArrayGreedyMatrix |
| 237 | Strange Printer II | Hard | ArrayGraphTopological Sort |
| 238 | Subrectangle Queries | Medium | ArrayDesignMatrix |
| 239 | Sudoku Solver | Hard | ArrayHash TableBacktracking |
| 240 | Sum in a Matrix | Medium | ArraySortingHeap (Priority Queue) |
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