Contains Duplicate · Coding Interview Practice

Contains DuplicateGiven an integer array, return true if any value appears at least twice, and false if every element is distinct.Constraints

1 <= nums.length <= 10^5

-10^9 <= nums[i] <= 10^9

Examples

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

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

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