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countDuplicatesUnsorted


Count the number of duplicate elements in an unsorted array


countDuplicatesUnsorted([5, 7, 5, 11, 5, 3, 5, 1, 7, 1]) → 5
countDuplicatesUnsorted([1, 2, 3]) → 0
countDuplicatesUnsorted([1, 1, 1]) → 2

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public int countDuplicatesUnsorted(int[] nums) { }

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