Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 181 | Determine Color of a Chessboard Square | Easy | MathString |
| 182 | Determine if String Halves Are Alike | Easy | StringCounting |
| 183 | Determine if Two Events Have Conflict | Easy | ArrayString |
| 184 | Determine if Two Strings Are Close | Medium | Hash TableStringSorting |
| 185 | DI String Match | Easy | ArrayTwo PointersString |
| 186 | Dictionary Word Segmentation | Medium | Dynamic ProgrammingDPString |
| 187 | Diff Tool Builder | Medium | Advanced StringsStringComparison |
| 188 | Different Ways to Add Parentheses | Medium | MathStringDynamic Programming |
| 189 | Display Table of Food Orders in a Restaurant | Medium | ArrayHash TableString |
| 190 | Distinct Echo Substrings | Hard | StringTrieRolling Hash |
| 191 | Distinct Subsequences | Hard | StringDynamic Programming |
| 192 | Distinct Subsequences II | Hard | StringDynamic Programming |
| 193 | Divide a String Into Groups of Size k | Easy | StringSimulation |
| 194 | DNA Sequence Analyzer | Medium | Advanced StringsStringSliding Window |
| 195 | Dota2 Senate | Medium | StringGreedyQueue |
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