Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 181 | Distinct Echo Substrings | Hard | StringTrieRolling Hash |
| 182 | Distinct Subsequences | Hard | StringDynamic Programming |
| 183 | Distinct Subsequences II | Hard | StringDynamic Programming |
| 184 | Divide a String Into Groups of Size k | Easy | StringSimulation |
| 185 | Dota2 Senate | Medium | StringGreedyQueue |
| 186 | Edit Distance | Medium | StringDynamic Programming |
| 187 | Encode and Decode Strings | Medium | ArrayStringDesign |
| 188 | Encode and Decode TinyURL | Medium | Hash TableStringDesign |
| 189 | Encode Number | Medium | MathStringBit Manipulation |
| 190 | Encode String with Shortest Length | Hard | StringDynamic Programming |
| 191 | Encrypt and Decrypt Strings | Hard | ArrayHash TableString |
| 192 | Equal Rational Numbers | Hard | MathString |
| 193 | Equalize Strings by Adding or Removing Characters at Ends | Medium | StringBinary SearchDynamic Programming |
| 194 | Evaluate Division | Medium | ArrayStringDepth-First Search |
| 195 | Evaluate the Bracket Pairs of a String | Medium | ArrayHash TableString |
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