//全探索!
#include <bits/stdc++.h>
using namespace std;
#define int long long

int a,b;

signed main(){
  int r0,r1;
  cout << "? " << 0 << endl;
  cin>>r0;
  b = r0;
  cout << "? " << 1 << endl;
  cin>>r1;
  a = r1 - r0;
  cout << "! " << a <<" "<< b << endl;
}