int dsquared(int x, int y)
{
  return x*x + y*y;
}

int main () 
{
  int a1 = 15;
  int b1 = 122;
  int a2 = 42;
  int b2 = 0;
  int a3 = -7;
  int b3 = -11;
  int a4 = -4;
  int b4 = 3;
  int sum = 0;
  sum = sum + dsquared(a1,b1);
  sum = sum + dsquared(a2,b2);
  sum = sum + dsquared(a3,b3);
  sum = sum + dsquared(a4,b4);
  return sum;
}