Hash Table

13 questions

1Longest Substring Without Repeating CharactersMedium

Hash TableStringSliding Window

2LRU CacheMedium

Hash TableLinked ListDesign

3Longest Substring Without Repeating CharactersMedium

Hash TableStringSliding Window

4Valid AnagramEasy

Hash TableStringSorting

5First Unique Character in a StringEasy

Hash TableStringQueue

6Roman to IntegerEasy

Hash TableMathString

7Sort Characters By FrequencyMedium

Hash TableStringSorting

8Longest Substring Without Repeating CharactersMedium

Hash TableStringSliding Window

9Valid AnagramEasy

Hash TableStringSorting

10First Unique Character in a StringEasy

Hash TableStringQueue

11Roman to IntegerEasy

Hash TableMathString

12Sort Characters By FrequencyMedium

Hash TableStringSorting

13LRU CacheMedium

Hash TableLinked ListDesign