LeetCode217存在重复元素

未经博主同意，禁止瞎JB转载。

https://leetcode-cn.com/problems/contains-duplicate/description/

我的解法：

字典

class Solution(object):    def containsDuplicate(self, nums):        """        :type nums: List[int]        :rtype: bool        """        ret = {}        for i in nums:            if i in ret:                return True            else:                ret[i] = 1        return False