Leetcode + Contains Duplicate

Leetcode + Contains Duplicate"/>

Leetcode + Contains Duplicate

Leetcode + Contains Duplicate

题目描述

Given an array of integers, find if the array contains any duplicates.

Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct.

Example 1:

Input: [1,2,3,1]
Output: true

Example 2:

Input: [1,2,3,4]
Output: false

Example 3:

Input: [1,1,1,3,3,4,3,2,4,2]
Output: true

来源：力扣（LeetCode）
链接：
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思路解析

class Solution:def containsDuplicate(self, nums: List[int]) -> bool:visited = set()for num in nums:if num in visited:return Truevisited.add(num)return False