Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 601 | Report Spam Message | Medium | ArrayHash TableString |
| 602 | Restore the Array From Adjacent Pairs | Medium | ArrayHash TableDepth-First Search |
| 603 | Reward Top K Students | Medium | ArrayHash TableString |
| 604 | Right Triangles | Medium | ArrayHash TableMath |
| 605 | Rings and Rods | Easy | Hash TableString |
| 606 | Roman to Integer | Easy | Hash TableMathString |
| 607 | Second Largest Digit in a String | Easy | Hash TableString |
| 608 | Select K Disjoint Special Substrings | Medium | Hash TableStringDynamic Programming |
| 609 | Sender With Largest Word Count | Medium | ArrayHash TableString |
| 610 | Sentence Similarity | Easy | ArrayHash TableString |
| 611 | Sentence Similarity II | Medium | ArrayHash TableString |
| 612 | Set Matrix Zeroes | Medium | ArrayHash TableMatrix |
| 613 | Set Mismatch | Easy | ArrayHash TableBit Manipulation |
| 614 | Short Encoding of Words | Medium | ArrayHash TableString |
| 615 | Shortest Completing Word | Easy | ArrayHash TableString |
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