Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 181 | Number of Paths with Max Score | Hard | ArrayDynamic ProgrammingMatrix |
| 182 | Number of People That Can Be Seen in a Grid | Medium | ArrayStackMatrix |
| 183 | Number of Spaces Cleaning Robot Cleaned | Medium | ArrayMatrixSimulation |
| 184 | Number of Submatrices That Sum to Target | Hard | ArrayHash TableMatrix |
| 185 | Number of Ways of Cutting a Pizza | Hard | ArrayDynamic ProgrammingMemoization |
| 186 | Pacific Atlantic Water Flow | Medium | ArrayDepth-First SearchBreadth-First Search |
| 187 | Path with Maximum Gold | Medium | ArrayBacktrackingMatrix |
| 188 | Path With Maximum Minimum Value | Medium | ArrayBinary SearchDepth-First Search |
| 189 | Path With Minimum Effort | Medium | ArrayBinary SearchDepth-First Search |
| 190 | Paths in Matrix Whose Sum Is Divisible by K | Hard | ArrayDynamic ProgrammingMatrix |
| 191 | Prime In Diagonal | Easy | ArrayMathMatrix |
| 192 | Projection Area of 3D Shapes | Easy | ArrayMathGeometry |
| 193 | Queens That Can Attack the King | Medium | ArrayMatrixSimulation |
| 194 | Range Sum Query 2D - Immutable | Medium | ArrayDesignMatrix |
| 195 | Range Sum Query 2D - Mutable | Medium | ArrayDesignBinary Indexed Tree |
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