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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << "? 0" << endl;
    int a, b;
    cin >> b;
    cout << "? 1" << endl;
    int x;
    cin >> x;
    a = x - b;
    cout << "! " << a << " " << b << endl;
}