Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 406 | Making File Names Unique | Medium | ArrayHash TableString |
| 407 | Map Sum Pairs | Medium | Hash TableStringDesign |
| 408 | Markdown to Plain Text | Medium | Advanced StringsStringParsing |
| 409 | Masking Personal Information | Medium | String |
| 410 | Match Alphanumerical Pattern in Matrix I | Medium | ArrayHash TableString |
| 411 | Match Substring After Replacement | Hard | ArrayHash TableString |
| 412 | Maximize Active Section with Trade I | Medium | StringEnumeration |
| 413 | Maximize Active Section with Trade II | Hard | ArrayStringBinary Search |
| 414 | Maximize Amount After Two Days of Conversions | Medium | ArrayStringDepth-First Search |
| 415 | Maximize Number of Subsequences in a String | Medium | StringGreedyPrefix Sum |
| 416 | Maximize Palindrome Length From Subsequences | Hard | StringDynamic Programming |
| 417 | Maximize the Confusion of an Exam | Medium | StringBinary SearchSliding Window |
| 418 | Maximize the Number of Partitions After Operations | Hard | StringDynamic ProgrammingBit Manipulation |
| 419 | Maximum Binary String After Change | Medium | StringGreedy |
| 420 | Maximum Deletions on a String | Hard | StringDynamic ProgrammingRolling Hash |
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