#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using VI = vector<int>;
using P = pair<int, int>;
constexpr int INF = 1001001001;
constexpr ll LINF = 1001001001001001001ll;
#define rep(i, n) for (ll i = 0; i < (int)(n); i++)

int main(){
    int a, b;
    int r0, r1;
    cout << "? " << 0 << endl;
    cin >> r0;
    cout << "? " << 1 << endl;
    cin >> r1; 
    a = r1 - r0;
    b = r0;
    if(r1 == -1e9 || r0 == -1e9) {
        cout << "error" << endl;
        exit(1);
    }

    cout << "! " << a << ' ' << b << endl;

}