#include<bits/stdc++.h>

using namespace std;

int main(){
    int fx0,fx1;
    cout << "? 0" << endl;
    cin >> fx0;
    cout << "? 1" << endl;
    cin >> fx1;
    cout << "! " << fx1 - fx0 << " " << fx0 << endl;
    return 0;
}