leetcode.com/explore/interview/card/top-interview-questions-easy/92/array/578/ Explore - LeetCode LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. No matter if you are a beginner or a master, there are always new topics waiting for you to explore. leetcode.com 풀이 파이썬의 set 자료형을 사용하여 중복 존재 유무 판단 class Solution: def containsDuplicate(self, nums: List[int..