Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 211 | Search a 2D Matrix | Medium | ArrayBinary SearchMatrix |
| 212 | Search a 2D Matrix II | Medium | ArrayBinary SearchDivide and Conquer |
| 213 | Select Cells in Grid With Maximum Score | Hard | ArrayDynamic ProgrammingBit Manipulation |
| 214 | Sequential Grid Path Cover | Medium | ArrayRecursionMatrix |
| 215 | Set Matrix Zeroes | Medium | ArrayHash TableMatrix |
| 216 | Shift 2D Grid | Easy | ArrayMatrixSimulation |
| 217 | Shortest Bridge | Medium | ArrayDepth-First SearchBreadth-First Search |
| 218 | Shortest Distance from All Buildings | Hard | ArrayBreadth-First SearchMatrix |
| 219 | Shortest Path in a Grid with Obstacles Elimination | Hard | ArrayBreadth-First SearchMatrix |
| 220 | Shortest Path in a Hidden Grid | Medium | ArrayDepth-First SearchBreadth-First Search |
| 221 | Shortest Path in Binary Matrix | Medium | ArrayBreadth-First SearchMatrix |
| 222 | Shortest Path to Get All Keys | Hard | ArrayBit ManipulationBreadth-First Search |
| 223 | Shortest Path to Get Food | Medium | ArrayBreadth-First SearchMatrix |
| 224 | Sliding Puzzle | Hard | ArrayDynamic ProgrammingBacktracking |
| 225 | Smallest Rectangle Enclosing Black Pixels | Hard | ArrayBinary SearchDepth-First Search |
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