#include <bits/stdc++.h>
using namespace std;
int main(){
	cout << '?' << ' ' << 1 << endl;
	int a;
	cin >> a;
	cout << '?' << ' ' << -1 << endl;
	int b;
	cin >> b;
	cout << '!' << ' ' << (a - b) / 2 << ' ' << (a + b) / 2 << endl;
}