Practice problems across 75+ categories
Practice problems frequently asked at Microsoft • 3344 problems | 831 Easy | 1747 Medium | 746 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 601 | Count Triplets with Even XOR Set Bits II | Medium | ArrayBit Manipulation |
| 602 | Count Unguarded Cells in the Grid | Medium | ArrayMatrixSimulation |
| 603 | Count Unhappy Friends | Medium | ArraySimulation |
| 604 | Count Unique Characters of All Substrings of a Given String | Hard | Hash TableStringDynamic Programming |
| 605 | Count Univalue Subtrees | Medium | TreeDepth-First SearchBinary Tree |
| 606 | Count Unreachable Pairs of Nodes in an Undirected Graph | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 607 | Count Valid Paths in a Tree | Hard | MathDynamic ProgrammingTree |
| 608 | Count Visited Nodes in a Directed Graph | Hard | Dynamic ProgrammingGraphMemoization |
| 609 | Count Vowel Strings in Ranges | Medium | ArrayStringPrefix Sum |
| 610 | Count Vowel Substrings of a String | Easy | Hash TableString |
| 611 | Count Vowels Permutation | Hard | Dynamic Programming |
| 612 | Count Ways To Build Good Strings | Medium | Dynamic Programming |
| 613 | Count Ways to Build Rooms in an Ant Colony | Hard | MathDynamic ProgrammingTree |
| 614 | Count Ways to Distribute Candies | Hard | Dynamic Programming |
| 615 | Count Ways to Group Overlapping Ranges | Medium | ArraySorting |
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