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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

Constraints

  • 1 <= nums.length <= 10^5
  • -10^9 <= nums[i] <= 10^9

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Test Cases

Case 1

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

Case 2

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

Case 3

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