Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 211 | Find Anagram Mappings | Easy | ArrayHash Table |
| 212 | Find And Replace in String | Medium | ArrayHash TableString |
| 213 | Find and Replace Pattern | Medium | ArrayHash TableString |
| 214 | Find Common Characters | Easy | ArrayHash TableString |
| 215 | Find Common Elements Between Two Arrays | Easy | ArrayHash Table |
| 216 | Find Consecutive Integers from a Data Stream | Medium | Hash TableDesignQueue |
| 217 | Find Distance in a Binary Tree | Medium | Hash TableTreeDepth-First Search |
| 218 | Find Duplicate File in System | Medium | ArrayHash TableString |
| 219 | Find Duplicate Subtrees | Medium | Hash TableTreeDepth-First Search |
| 220 | Find Elements in a Contaminated Binary Tree | Medium | Hash TableTreeDepth-First Search |
| 221 | Find K-Length Substrings With No Repeated Characters | Medium | Hash TableStringSliding Window |
| 222 | Find Latest Group of Size M | Medium | ArrayHash TableBinary Search |
| 223 | Find Longest Awesome Substring | Hard | Hash TableStringBit Manipulation |
| 224 | Find Longest Self-Contained Substring | Hard | Hash TableStringBinary Search |
| 225 | Find Longest Special Substring That Occurs Thrice I | Medium | Hash TableStringBinary Search |
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