Description
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.
Examples
Input:
nums = [1,2,3,1]Output:
trueExplanation:
The value 1 appears twice.
Input:
nums = [1,2,3,4]Output:
falseExplanation:
All elements are distinct.
Input:
nums = [1,1,1,3,3,4,3,2,4,2]Output:
trueExplanation:
Multiple duplicates exist.
Constraints
- •
1 ≤ nums.length ≤ 10⁵ - •
-10⁹ ≤ nums[i] ≤ 10⁹