Practice problems across 75+ categories
Practice problems frequently asked at Microsoft • 3344 problems | 831 Easy | 1747 Medium | 746 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 526 | Count Positions on Street With Required Brightness | Medium | ArrayPrefix Sum |
| 527 | Count Prefix and Suffix Pairs I | Easy | ArrayStringTrie |
| 528 | Count Prefix and Suffix Pairs II | Hard | ArrayStringTrie |
| 529 | Count Prefixes of a Given String | Easy | ArrayString |
| 530 | Count Prime-Gap Balanced Subarrays | Medium | ArrayMathQueue |
| 531 | Count Primes | Medium | ArrayMathEnumeration |
| 532 | Count Salary Categories | Medium | Database |
| 533 | Count Servers that Communicate | Medium | ArrayDepth-First SearchBreadth-First Search |
| 534 | Count Sorted Vowel Strings | Medium | MathDynamic ProgrammingCombinatorics |
| 535 | Count Special Integers | Hard | MathDynamic Programming |
| 536 | Count Special Quadruplets | Easy | ArrayHash TableEnumeration |
| 537 | Count Special Subsequences | Medium | ArrayHash TableMath |
| 538 | Count Special Triplets | Medium | ArrayHash TableCounting |
| 539 | Count Square Submatrices with All Ones | Medium | ArrayDynamic ProgrammingMatrix |
| 540 | Count Square Sum Triples | Easy | MathEnumeration |
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