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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 <= 10⁵
  • -10⁹ <= nums[i] <= 10⁹

Code

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Custom Test Cases

Test Case 1

Input Parameters:
Expected Output:

Test Case 2

Input Parameters:
Expected Output:

Test Case 3

Input Parameters:
Expected Output: