public static void quickSort(double[] array, int i, int j) {
if (j <= i)
return;
int pivotIndext = (i + j) / 2;
swap(array, pivotIndext, j);
int k = partition(array, i - 1, j, array[j]);
swap(array, j, k);
quickSort(array, i, k - 1);
quickSort(array, k, j);
}
public static int partition(double[] array, int left, int right, double pivot) {
do {
while (array[++left] < pivot)
;
while ((left < right) & (pivot < array[--right]))
;
swap(array, left, right);
} while (left < right);
return 0;
}
public static void swap(double[] data, int a, int b) {
double t = data[a];
data[a] = data[b];
data[b] = t;
} 
                        
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