Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Apply Operations to Make Two Strings Equal | Medium | StringDynamic Programming |
| 17 | Apply Substitutions | Medium | ArrayHash TableString |
| 18 | Auto-Complete System | Medium | Advanced StringsStringTrie |
| 19 | Backspace String Compare | Easy | Two PointersStringStack |
| 20 | Base 7 | Easy | MathString |
| 21 | Basic Calculator | Hard | MathStringStack |
| 22 | Basic Calculator II | Medium | MathStringStack |
| 23 | Basic Calculator III | Hard | MathStringStack |
| 24 | Basic Calculator IV | Hard | Hash TableMathString |
| 25 | Before and After Puzzle | Medium | ArrayHash TableString |
| 26 | Better Compression of String | Medium | Hash TableStringSorting |
| 27 | Binary String With Substrings Representing 1 To N | Medium | Hash TableStringBit Manipulation |
| 28 | Binary Tree Paths | Easy | StringBacktrackingTree |
| 29 | Bold Words in String | Medium | ArrayHash TableString |
| 30 | Brace Expansion | Unknown | StringBacktrackingStack |
Powerful online tools to boost your productivity
Coding Ground For Developers
Code, Edit, Run and ShareIgnite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.
