Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3526 | Unique Word Abbreviation | Medium | ArrayHash TableString |
| 3527 | Unit Conversion I | Medium | Depth-First SearchBreadth-First SearchGraph |
| 3528 | Unit Conversion II | Medium | ArrayMathDepth-First Search |
| 3529 | Univalued Binary Tree | Easy | TreeDepth-First SearchBreadth-First Search |
| 3530 | Unpopular Books | Unknown | Database |
| 3531 | User Activities within Time Bounds | Hard | Database |
| 3532 | User Activity for the Past 30 Days I | Easy | Database |
| 3533 | User Activity for the Past 30 Days II | Easy | Database |
| 3534 | User Purchase Platform | Hard | Database |
| 3535 | Users That Actively Request Confirmation Messages | Easy | Database |
| 3536 | Users With Two Purchases Within Seven Days | Medium | Database |
| 3537 | Using a Robot to Print the Lexicographically Smallest String | Medium | Hash TableStringStack |
| 3538 | UTF-8 Validation | Medium | ArrayBit Manipulation |
| 3539 | Valid Anagram | Easy | Hash TableStringSorting |
| 3540 | Valid Arrangement of Pairs | Hard | Depth-First SearchGraphEulerian Circuit |
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