Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 586 | Count the Number of Consistent Strings | Easy | ArrayHash TableString |
| 587 | Count the Number of Experiments | Medium | Database |
| 588 | Count the Number of Fair Pairs | Medium | ArrayTwo PointersBinary Search |
| 589 | Count the Number of Good Nodes | Medium | TreeDepth-First Search |
| 590 | Count the Number of Good Partitions | Hard | ArrayHash TableMath |
| 591 | Count the Number of Good Subarrays | Medium | ArrayHash TableSliding Window |
| 592 | Count the Number of Good Subsequences | Medium | Hash TableMathString |
| 593 | Count the Number of Houses at a Certain Distance I | Medium | Breadth-First SearchGraphPrefix Sum |
| 594 | Count the Number of Houses at a Certain Distance II | Hard | GraphPrefix Sum |
| 595 | Count the Number of Ideal Arrays | Hard | MathDynamic ProgrammingCombinatorics |
| 596 | Count the Number of Incremovable Subarrays I | Easy | ArrayTwo PointersBinary Search |
| 597 | Count the Number of Incremovable Subarrays II | Hard | ArrayTwo PointersBinary Search |
| 598 | Count the Number of Infection Sequences | Hard | ArrayMathCombinatorics |
| 599 | Count the Number of Inversions | Hard | ArrayDynamic Programming |
| 600 | Count the Number of K-Big Indices | Hard | ArrayBinary SearchDivide and Conquer |
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