#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,ll> P;
#define REP(i,n) for(ll i=0;i<ll(n);i++)









int main(void){
	cin.tie(nullptr);  ios_base::sync_with_stdio(false);
	ll i,j;




	cout << "?" << ' ' << 1 << endl;
	cout.flush();

	ll x;
	cin >> x;

	cout << "?" << ' ' << -1 << endl;
	cout.flush();

	ll y;
	cin >> y;


	cout << "!" << ' ' << (x-y)/2 << ' ' << (x+y)/2 << endl;
	cout.flush();






	return 0;
}