Practice problems across 75+ categories
Practice problems frequently asked at Rolling Hash • 30 problems | 1 Easy | 12 Medium | 16 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1 | Check If a String Contains All Binary Codes of Size K | Medium | Hash TableStringBit Manipulation |
| 2 | Count Cells in Overlapping Horizontal and Vertical Substrings | Medium | ArrayStringRolling Hash |
| 3 | Count Prefix and Suffix Pairs I | Easy | ArrayStringTrie |
| 4 | Count Prefix and Suffix Pairs II | Hard | ArrayStringTrie |
| 5 | Distinct Echo Substrings | Hard | StringTrieRolling Hash |
| 6 | Find Beautiful Indices in the Given Array I | Medium | Two PointersStringBinary Search |
| 7 | Find Beautiful Indices in the Given Array II | Hard | Two PointersStringBinary Search |
| 8 | Find Pattern in Infinite Stream I | Medium | ArraySliding WindowRolling Hash |
| 9 | Find Pattern in Infinite Stream II | Hard | ArraySliding WindowRolling Hash |
| 10 | Find Substring With Given Hash Value | Hard | StringSliding WindowRolling Hash |
| 11 | K Divisible Elements Subarrays | Medium | ArrayHash TableTrie |
| 12 | Longest Chunked Palindrome Decomposition | Hard | Two PointersStringDynamic Programming |
| 13 | Longest Common Subpath | Hard | ArrayBinary SearchRolling Hash |
| 14 | Longest Duplicate Substring | Hard | StringBinary SearchSliding Window |
| 15 | Longest Happy Prefix | Hard | StringRolling HashString Matching |
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