# Hash Table

- [Rehashing](/algo/hash-table/rehashing.md): ID: 129; medium
- [Valid Anagram](/algo/hash-table/valid-anagram.md): ID: 242; easy
- [Two Sum](/algo/hash-table/two-sum.md): ID: 1; Easy
- [Contiguous Array](/algo/hash-table/contiguous-array.md): ID: 525; medium
- [Anagrams](/algo/hash-table/anagrams.md): ID: 171; medium
- [Remove Duplicate Numbers in Array](/algo/hash-table/remove-duplicate-numbers-in-array.md): ID: 521; easy
- [Friendship Service](/algo/hash-table/friendship-service.md): ID: 560; easy