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norm.krumpe@muohio.edu program11 > eachDuplicate
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Given an array of integers, return true if each element in the array appears exactly twice. Solve this without modifying the given array or creating a new array.


eachDuplicate([1, 1, 2, 2, 3, 3]) → true
eachDuplicate([1, 2, 3, 3, 2, 1]) → true
eachDuplicate([3, 1, 4, 1, 3, 5, 4]) → false

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boolean eachDuplicate(int[] nums) { }

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