#include <stl.h>
#include <iostream.h>

int numbers[5] = { 1, 2, 4, 8, 16 };

int main ()
{
  int difference[5];
  adjacent_difference (numbers, numbers + 5, difference);
  for (int i = 0; i < 5; i++)
    cout << numbers[i] << ' ';
  cout << endl;
  for (i = 0; i < 5; i++)
    cout << difference[i] << ' ';
  cout << endl;
  return 0;
}