Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 556 | Palindrome Permutation II | Medium | Hash TableStringBacktracking |
| 557 | Palindrome Rearrangement Queries | Hard | Hash TableStringPrefix Sum |
| 558 | Parse Lisp Expression | Hard | Hash TableStringStack |
| 559 | Partition Labels | Medium | Hash TableTwo PointersString |
| 560 | Partition String | Unknown | Hash TableStringTrie |
| 561 | Partition String | Unknown | Hash TableStringTrie |
| 562 | Partition String Into Minimum Beautiful Substrings | Medium | Hash TableStringDynamic Programming |
| 563 | Path Crossing | Easy | Hash TableString |
| 564 | Path Existence Queries in a Graph I | Medium | ArrayHash TableBinary Search |
| 565 | Path Sum IV | Medium | ArrayHash TableTree |
| 566 | People Whose List of Favorite Companies Is Not a Subset of Another List | Medium | ArrayHash TableString |
| 567 | Perfect Rectangle | Hard | ArrayHash TableMath |
| 568 | Permutation Difference between Two Strings | Easy | Hash TableString |
| 569 | Permutation in String | Medium | Hash TableTwo PointersString |
| 570 | Points That Intersect With Cars | Easy | ArrayHash TablePrefix Sum |
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