#include <string>
#include <iostream>
#include <vector>
#include <stack>
using namespace std;
using ll = long long;

#define rep(i, n) for(int i=0; i<n; ++i)

int sqrt(ll x) {
    for(int i=1; i<10; i++) if(x == i * i) return i;
}

int main() {
    ll n;
    cin >> n;
    if(n == 2) {
        cout << "? 0 1" << endl;
        ll ret;
        cin >> ret;
        if(ret == 1) {
            cout << "! 11" << endl;
        } else if(ret == 25) {
            cout << "! 55" << endl;
        } else if(ret == 49) {
            cout << "! 77" << endl;
        } else if(ret == 64) {
            cout << "! 88" << endl;
        } else if(ret == 81) {
            cout << "! 99" << endl;
        } else {
            cout << "! -1" << endl;
            return 0;
        }
    } else {
        vector<ll> res(10, n);
        vector<ll> non_zero;
        rep(i, n-1){
            cout << "? " << i << " " << n-1 << endl;
            cin >> res[i];
            if(res[i] != 0) non_zero.emplace_back(i);
        }
        if(non_zero.size() < 2) {
            cout << "! -1" << endl;
            return 1;
        }
        cout << "? " << non_zero[0] << " " << non_zero[1] << endl;
        ll res01;
        cin >> res01;
        res[n-1] = res[non_zero[0]] * res[non_zero[1]] / res01;
        ll a_back = sqrt(res[n-1]);
        cout << "! ";
        rep(i, n) {
            cout << res[n-1-i] / a_back;
        }
        cout << endl;
    }
}