Given an integer array nums, return true if any value appears at least twice, or false if every element is distinct.

Example 1:

Input: 1 2 3 1
Output: true

Example 2:

Input: 1 2 3 4
Output: false

Constraints:

• 1 ≤ nums.length ≤ 10⁵
• -10⁹ ≤ nums[i] ≤ 10⁹

Input format: Space-separated integers.

Output format: true or false