Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 451 | Count Beautiful Numbers | Hard | Dynamic Programming |
| 452 | Count Beautiful Splits in an Array | Medium | ArrayDynamic Programming |
| 453 | Count Beautiful Substrings I | Medium | Hash TableMathString |
| 454 | Count Beautiful Substrings II | Hard | Hash TableMathString |
| 455 | Count Binary Substrings | Easy | Two PointersString |
| 456 | Count Cells in Overlapping Horizontal and Vertical Substrings | Medium | ArrayStringRolling Hash |
| 457 | Count Collisions of Monkeys on a Polygon | Medium | MathRecursion |
| 458 | Count Collisions on a Road | Medium | StringStackSimulation |
| 459 | Count Common Words With One Occurrence | Easy | ArrayHash TableString |
| 460 | Count Complete Subarrays in an Array | Medium | ArrayHash TableSliding Window |
| 461 | Count Complete Substrings | Hard | Hash TableStringSliding Window |
| 462 | Count Complete Tree Nodes | Easy | Binary SearchBit ManipulationTree |
| 463 | Count Connected Components in LCM Graph | Hard | ArrayHash TableMath |
| 464 | Count Covered Buildings | Medium | ArrayHash TableSorting |
| 465 | Count Days Spent Together | Easy | MathString |
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