26 /** Returns the sum of the prefix sums of given array. */ 27 public static int example4(int[] arr) { 28 29 int n = arr.length, prefix = 0, total = 0; for (int j=0; j< n; j++) { prefix += arr[j]; 30 31 total + = prefix; 32 33 34 } } return total; // loop from 0 to n-1
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