What is the output of the following program?

void f(int& x, int& y, int z) {
  if (x > y) x = z;
  else y = z;
}
int main() {
  int a = 1, b = 2, c = 3;
  f(a, b, c);
  f(a, c, b);
  cout << a << ' ' << b << ' ' << c << '\n';
  return 0;
}