#include<bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (int i = a; i < b; i++)
using ll = long long;

int main(){
	int  x = 0, f, INF = 1e9;
    cout << "? " << x << endl;
    cin >> f;
	if(f == -INF) return 0;
	int b = f;
	x = 1;
	cout << "? " << x << endl;
	cin >> f;
	if(f == -INF) return 0;
	f -= b;
	cout << "! " << f << " " << b << endl;
}