main()
{
  int x = 1, y = 2, z = 3;
  int f1()
    {
      int x = 4;
      y = x + y + z + f2();
      return y;
    }
  int f2()
    {
      int y = 5;
      int f3()
	{
	  int z = 6;
	  x = x + y + z + 3*f1();
	  return x;
	}
      z = x + y + z + 2 * f3();
      return z;
    }
  x = x = y + z + f1();
}