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Given an integer array "arr", return the array sorted from greatest to least.


array_sort([1, 2, 3]) → [3, 2, 1]
array_sort([3, 1, 2]) → [3, 2, 1]
array_sort([1, 3, 2]) → [3, 2, 1]

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public int[] array_sort(int[] arr) { }

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