Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2401 | Number of Excellent Pairs | Hard | ArrayHash TableBinary Search |
| 2402 | Number of Flowers in Full Bloom | Hard | ArrayHash TableBinary Search |
| 2403 | Number of Good Binary Strings | Medium | Dynamic Programming |
| 2404 | Number of Good Leaf Nodes Pairs | Medium | TreeDepth-First SearchBinary Tree |
| 2405 | Number of Good Pairs | Easy | ArrayHash TableMath |
| 2406 | Number of Good Paths | Hard | ArrayHash TableTree |
| 2407 | Number of Good Ways to Split a String | Medium | Hash TableStringDynamic Programming |
| 2408 | Number of Great Partitions | Hard | ArrayDynamic Programming |
| 2409 | Number of Increasing Paths in a Grid | Hard | ArrayDynamic ProgrammingDepth-First Search |
| 2410 | Number of Islands | Medium | ArrayDepth-First SearchBreadth-First Search |
| 2411 | Number of Islands II | Hard | ArrayHash TableUnion Find |
| 2412 | Number of Laser Beams in a Bank | Medium | ArrayMathString |
| 2413 | Number of Lines To Write String | Easy | ArrayString |
| 2414 | Number of Longest Increasing Subsequence | Medium | ArrayDynamic ProgrammingBinary Indexed Tree |
| 2415 | Number of Matching Subsequences | Medium | ArrayHash TableString |
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