[Solved] 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.

Question

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

Constraints:

• 1 <= nums.length <= 105
• -109 <= nums[i] <= 109

Python Solution

class Solution:
    def containsDuplicate(self, nums: List[int]) -> bool:
        return (len(nums)!=len(set(nums)))