Practice problems across 75+ categories
Practice problems frequently asked at Simulation • 185 problems | 78 Easy | 92 Medium | 14 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 136 | Queries on a Permutation With Key | Medium | ArrayBinary Indexed TreeSimulation |
| 137 | Read N Characters Given Read4 | Easy | ArraySimulationInteractive |
| 138 | Read N Characters Given read4 II - Call Multiple Times | Hard | ArraySimulationInteractive |
| 139 | Rearrange Array Elements by Sign | Medium | ArrayTwo PointersSimulation |
| 140 | Relocate Marbles | Medium | ArrayHash TableSorting |
| 141 | Remove All Occurrences of a Substring | Medium | StringStackSimulation |
| 142 | Removing Stars From a String | Medium | StringStackSimulation |
| 143 | Replace Elements in an Array | Medium | ArrayHash TableSimulation |
| 144 | Reshape the Matrix | Easy | ArrayMatrixSimulation |
| 145 | Resulting String After Adjacent Removals | Medium | StringStackSimulation |
| 146 | Reveal Cards In Increasing Order | Medium | ArrayQueueSorting |
| 147 | Reverse Degree of a String | Easy | StringSimulation |
| 148 | Robot Bounded In Circle | Medium | MathStringSimulation |
| 149 | Robot Collisions | Hard | ArrayStackSorting |
| 150 | Robot Return to Origin | Easy | StringSimulation |
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