Spotify

4 problems asked at Spotify.

Easy (3)

Two Sum (Leetcode 1)

Two Pointers, Arrays

Valid Anagram (leetcode 242)

Arrays, Hashing, Strings

Valid Parentheses (Leetcode 20)

Stack, Strings

Medium (1)

Longest Substring Without Repeating Characters (leetcode 3)

Sliding Window, Strings, Hashing