Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 196 | Edit Distance | Medium | StringDynamic Programming |
| 197 | Email Validator | Easy | StringsStringLogic |
| 198 | Encode and Decode Strings | Medium | ArrayStringDesign |
| 199 | Encode and Decode TinyURL | Medium | Hash TableStringDesign |
| 200 | Encode Number | Medium | MathStringBit Manipulation |
| 201 | Encode String with Shortest Length | Hard | StringDynamic Programming |
| 202 | Encrypt and Decrypt Strings | Hard | ArrayHash TableString |
| 203 | Equal Rational Numbers | Hard | MathString |
| 204 | Equalize Strings by Adding or Removing Characters at Ends | Medium | StringBinary SearchDynamic Programming |
| 205 | Evaluate Division | Medium | ArrayStringDepth-First Search |
| 206 | Evaluate the Bracket Pairs of a String | Medium | ArrayHash TableString |
| 207 | Excel Sheet Column Number | Easy | MathString |
| 208 | Excel Sheet Column Title | Easy | MathString |
| 209 | Execution of All Suffix Instructions Staying in a Grid | Medium | StringSimulation |
| 210 | Existence of a Substring in a String and Its Reverse | Easy | Hash TableString |
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