Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 616 | Shortest Impossible Sequence of Rolls | Hard | ArrayHash TableGreedy |
| 617 | Shortest Uncommon Substring in an Array | Medium | ArrayHash TableString |
| 618 | Shortest Word Distance II | Medium | ArrayHash TableTwo Pointers |
| 619 | Similar String Groups | Hard | ArrayHash TableString |
| 620 | Simple Bank System | Medium | ArrayHash TableDesign |
| 621 | Single-Row Keyboard | Easy | Hash TableString |
| 622 | Sliding Subarray Beauty | Medium | ArrayHash TableSliding Window |
| 623 | Sliding Window Median | Hard | ArrayHash TableSliding Window |
| 624 | Smallest Common Region | Medium | ArrayHash TableString |
| 625 | Smallest Integer Divisible by K | Medium | Hash TableMath |
| 626 | Smallest Missing Integer Greater Than Sequential Prefix Sum | Easy | ArrayHash TableSorting |
| 627 | Smallest Missing Non-negative Integer After Operations | Medium | ArrayHash TableMath |
| 628 | Smallest Number in Infinite Set | Medium | Hash TableDesignHeap (Priority Queue) |
| 629 | Smallest Palindromic Rearrangement II | Hard | Hash TableMathString |
| 630 | Smallest Range Covering Elements from K Lists | Hard | ArrayHash TableGreedy |
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