Python Solution ''' 시간 복잡도: O(n) -> items 쓰고 for문 돌면서 O(n) 공간 복잡도: O(n) -> counter 변수에 Counter 배정 Runtime: 482 ms, faster than 81.08% of Python3 online submissions for Contains Duplicate. Memory Usage: 25.9 MB, less than 94.00% of Python3 online submissions for Contains Duplicate. ''' from collections import Counter class Solution: def containsDuplicate(self, nums: List[i..