#include <bits/stdc++.h>
using namespace std;
#define si(a) (long)a.size()
#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<(int)(n);++i)
template<typename S,typename F>bool chmin(S&a,F b){return b<a?(a=b,1):0;}
template<typename S,typename F>bool chmax(S&a,F b){return b>a?(a=b,1):0;}

int main(){
    cout<<"? "<<-3000<<endl;
    int X;
    cin>>X;
    cout<<"! "<<-3000+X<<endl;
}