Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 196 | Employee Importance | Medium | ArrayHash TableTree |
| 197 | Encode and Decode TinyURL | Medium | Hash TableStringDesign |
| 198 | Encrypt and Decrypt Strings | Hard | ArrayHash TableString |
| 199 | Equal Row and Column Pairs | Medium | ArrayHash TableMatrix |
| 200 | Equal Sum Arrays With Minimum Number of Operations | Medium | ArrayHash TableGreedy |
| 201 | Equal Sum Grid Partition II | Hard | ArrayHash TableMatrix |
| 202 | Escape a Large Maze | Hard | ArrayHash TableDepth-First Search |
| 203 | Evaluate the Bracket Pairs of a String | Medium | ArrayHash TableString |
| 204 | Existence of a Substring in a String and Its Reverse | Easy | Hash TableString |
| 205 | Extra Characters in a String | Medium | ArrayHash TableString |
| 206 | Fair Candy Swap | Easy | ArrayHash TableBinary Search |
| 207 | Find a Good Subset of the Matrix | Hard | ArrayHash TableBit Manipulation |
| 208 | Find All Anagrams in a String | Medium | Hash TableStringSliding Window |
| 209 | Find All Duplicates in an Array | Medium | ArrayHash TableSorting |
| 210 | Find All Lonely Numbers in the Array | Medium | ArrayHash TableCounting |
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