Practice problems across 75+ categories
Practice problems frequently asked at Microsoft • 3344 problems | 831 Easy | 1747 Medium | 746 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3256 | Unique Substrings With Equal Digit Frequency | Medium | |
| 3257 | Unique Word Abbreviation | Medium | ArrayHash TableString |
| 3258 | Unit Conversion I | Medium | Depth-First SearchBreadth-First SearchGraph |
| 3259 | Univalued Binary Tree | Easy | TreeDepth-First SearchBreadth-First Search |
| 3260 | Unpopular Books | Unknown | Database |
| 3261 | User Activity for the Past 30 Days I | Easy | Database |
| 3262 | User Activity for the Past 30 Days II | Easy | Database |
| 3263 | Users That Actively Request Confirmation Messages | Easy | Database |
| 3264 | Users With Two Purchases Within Seven Days | Medium | Database |
| 3265 | Using a Robot to Print the Lexicographically Smallest String | Medium | Hash TableStringStack |
| 3266 | UTF-8 Validation | Medium | ArrayBit Manipulation |
| 3267 | Valid Anagram | Easy | Hash TableStringSorting |
| 3268 | Valid Arrangement of Pairs | Hard | Depth-First SearchGraphEulerian Circuit |
| 3269 | Valid Boomerang | Easy | ArrayMathGeometry |
| 3270 | Valid Mountain Array | Easy | Array |
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