Leetcode 217. 存在重复元素 (Contains Duplicate)

标签：重复元素   out   block   tput   distinct   contain   pre   least   etc   

题目

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: true

Example 3:

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

Code

class Solution:
    def containsDuplicate(self, nums: List[int]) -> bool:
        d = set()
        for n in nums:
            if n not in d:
                d.add(n)
            else:
                return True
        return False

Leetcode 217. 存在重复元素 (Contains Duplicate)

标签：重复元素   out   block   tput   distinct   contain   pre   least   etc   

原文地址：https://www.cnblogs.com/yufeng97/p/12594021.html