void BubbleSort(int A[], int n) {
  int temp;

  for (int i=1; i<=n; i++) {
    for (int j=1; i<=n-i; j++) {
      if (A[j] > A[j+1]) {
        temp   = A[j];
        A[j]   = A[j+1];
        A[j+1] = temp;
      }
    }
  }
  return;
}