18 problems
String interview problems
18 String problems, from easy to hard. Each one has an editorial explaining the approach and its complexity, and a visualizer that runs the solution step by step on the example input or your own.
Easy (6)
Medium (9)
- 5. Longest Palindromic SubstringMedium
- 6. Zigzag ConversionMedium
- 8. String to Integer (atoi)Medium
- 36. Count and SayMedium
- 138. Reverse Words in a StringMedium
- 145. Compare Version NumbersMedium
- 277. Palindromic SubstringsMedium
- 377. Words Within Two Edits of DictionaryMedium
- 410. Minimum Operations to Sort a StringMedium