Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 331 | Largest Positive Integer That Exists With Its Negative | Easy | ArrayHash TableTwo Pointers |
| 332 | Largest Substring Between Two Equal Characters | Easy | Hash TableString |
| 333 | Largest Unique Number | Easy | ArrayHash TableSorting |
| 334 | Largest Values From Labels | Medium | ArrayHash TableGreedy |
| 335 | Least Number of Unique Integers after K Removals | Medium | ArrayHash TableGreedy |
| 336 | Length of Longest Fibonacci Subsequence | Medium | ArrayHash TableDynamic Programming |
| 337 | Length of Longest Subarray With at Most K Frequency | Medium | ArrayHash TableSliding Window |
| 338 | Length of the Longest Valid Substring | Hard | ArrayHash TableString |
| 339 | Letter Combinations of a Phone Number | Medium | Hash TableStringBacktracking |
| 340 | Letter Tile Possibilities | Medium | Hash TableStringBacktracking |
| 341 | Lexicographically Minimum String After Removing Stars | Medium | Hash TableStringStack |
| 342 | LFU Cache | Hard | Hash TableLinked ListDesign |
| 343 | Line Reflection | Medium | ArrayHash TableMath |
| 344 | Linked List Components | Medium | ArrayHash TableLinked List |
| 345 | Linked List Cycle | Easy | Hash TableLinked ListTwo Pointers |
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