Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 556 | Palindrome Permutation | Easy | Hash TableStringBit Manipulation |
| 557 | Palindrome Permutation II | Medium | Hash TableStringBacktracking |
| 558 | Palindrome Rearrangement Queries | Hard | Hash TableStringPrefix Sum |
| 559 | Palindromic Substrings | Medium | Two PointersStringDynamic Programming |
| 560 | Parse Lisp Expression | Hard | Hash TableStringStack |
| 561 | Parsing A Boolean Expression | Hard | StringStackRecursion |
| 562 | Partition Labels | Medium | Hash TableTwo PointersString |
| 563 | Partition String | Unknown | Hash TableStringTrie |
| 564 | Partition String | Unknown | Hash TableStringTrie |
| 565 | Partition String Into Minimum Beautiful Substrings | Medium | Hash TableStringDynamic Programming |
| 566 | Partition String Into Substrings With Values at Most K | Medium | StringDynamic ProgrammingGreedy |
| 567 | Partitioning Into Minimum Number Of Deci-Binary Numbers | Medium | StringGreedy |
| 568 | Path Crossing | Easy | Hash TableString |
| 569 | People Whose List of Favorite Companies Is Not a Subset of Another List | Medium | ArrayHash TableString |
| 570 | Percentage of Letter in String | Easy | String |
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