Problem Editor

Contains Duplicate

Easy

Given an integer array

nums

, return

true

if any value appears at least twice in the array, and return

false

if every element is distinct.

Example 1:

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

Example 2:

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

Example 3:

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

Property	Limit
Array Length	`1 <= nums.length <= 10^5`
Element Value	`-10^9 <= nums[i] <= 10^9`

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