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

template<class T> istream& operator >> (istream& is, vector<T>& vec) {
    for(T& x : vec) is >> x;
    return is;
}

template<class T> ostream& operator << (ostream& os, const vector<T>& vec) {
    if(vec.empty()) return os;
    os << vec[0];
    for(auto it = vec.begin(); ++it != vec.end(); ) os << ' ' << *it;
    return os;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int A, B, C;
    cout << "? 0" << endl;
    cin >> A;
    cout << "? " << A + A << endl;
    cin >> C;
    //2 * A mod B = C
    //2 * A - B = C
    B = 2 * A - C;
    cout << "! " << A << " " << B << endl;
}