Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 676 | Task Scheduler II | Medium | ArrayHash TableSimulation |
| 677 | The Number of Beautiful Subsets | Medium | ArrayHash TableMath |
| 678 | The Number of Good Subsets | Hard | ArrayHash TableMath |
| 679 | The Number of the Smallest Unoccupied Chair | Medium | ArrayHash TableHeap (Priority Queue) |
| 680 | The Score of Students Solving Math Expression | Hard | ArrayHash TableMath |
| 681 | The Two Sneaky Numbers of Digitville | Easy | ArrayHash TableMath |
| 682 | Throne Inheritance | Medium | Hash TableTreeDepth-First Search |
| 683 | Time Based Key-Value Store | Medium | Hash TableStringBinary Search |
| 684 | Top K Frequent Elements | Medium | ArrayHash TableDivide and Conquer |
| 685 | Top K Frequent Words | Medium | ArrayHash TableString |
| 686 | Total Appeal of A String | Hard | Hash TableStringDynamic Programming |
| 687 | Total Characters in String After Transformations I | Medium | Hash TableMathString |
| 688 | Total Characters in String After Transformations II | Hard | Hash TableMathString |
| 689 | Triples with Bitwise AND Equal To Zero | Hard | ArrayHash TableBit Manipulation |
| 690 | Tuple with Same Product | Medium | ArrayHash TableCounting |
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