int 
fun2 (int x, int y)
{
  int z;
  z = x * y;
  return z;
}

int 
fun1 (int k, int l)
{
  int m, n;
  int ret;
  m = k - l;
  n = k + l;
  ret = fun2 (m, n);
  return ret;
}

int
main (void)
{

   int i = 200;
   int j = 100;
   int ret;
   i = 300;
   j = 400;
   ret = fun1 (i, j);
   return ret;	
}