Hash Table

15 questions

1Longest Substring Without Repeating CharactersMedium

Hash TableStringSliding Window

2LRU CacheMedium

Hash TableLinked ListDesign

3Longest Substring Without Repeating CharactersMedium

Hash TableStringSliding Window

4Check Whether Two Strings are Almost EquivalentEasy

Hash TableStringCounting

5Happy NumberEasy

Hash TableMathTwo Pointers

6Longest Substring Without Repeating CharactersMedium

Hash TableStringSliding Window

7Check if Number Has Equal Digit Count and Digit ValueEasy

Hash TableStringCounting

8Letter Combinations of a Phone NumberMedium

Hash TableStringBacktracking

9Check Whether Two Strings are Almost EquivalentEasy

Hash TableStringCounting

10Check if Number Has Equal Digit Count and Digit ValueEasy

Hash TableStringCounting

11Happy NumberEasy

Hash TableMathTwo Pointers

12Longest Substring Without Repeating CharactersMedium

Hash TableStringSliding Window

13LRU CacheMedium

Hash TableLinked ListDesign

14Letter Combinations of a Phone NumberMedium

Hash TableStringBacktracking

15Integer to RomanMedium

Hash TableMathString