#include <bits/stdc++.h>
using namespace std;

long long ask(int a, int b) {
    cout << "? " << a << ' ' << b << '\n';
    cout.flush();
    long long p;
    cin >> p;
    if (p == -1) exit(0);
    return p;
}

void answer_string(const string& s) {
    cout << "! " << s << '\n';
    cout.flush();
    exit(0);
}

void answer_minus_one() {
    cout << "! -1\n";
    cout.flush();
    exit(0);
}

long long isqrt_ll(long long x) {
    long long r = sqrt((long double)x);
    while ((r + 1) * (r + 1) <= x) ++r;
    while (r * r > x) --r;
    return r;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int N;
    cin >> N;

    if (N == 1) {
        answer_minus_one();
    }

    int msd = N - 1;
    vector<long long> s(N, 0);
    vector<int> pos_positive;

    for (int i = 0; i < N - 1; ++i) {
        s[i] = ask(i, msd);
        if (s[i] > 0) pos_positive.push_back(i);
    }

    if ((int)pos_positive.size() >= 2) {
        int a = pos_positive[0];
        int b = pos_positive[1];
        long long p = ask(a, b);

        long long sq = s[a] * s[b] / p;
        long long d_msd = isqrt_ll(sq);

        vector<int> d(N, 0);
        d[msd] = (int)d_msd;
        for (int i = 0; i < N - 1; ++i) {
            d[i] = (int)(s[i] / d_msd);
        }

        string ans;
        for (int i = N - 1; i >= 0; --i) ans.push_back(char('0' + d[i]));
        answer_string(ans);
    }

    if ((int)pos_positive.size() == 1) {
        int a = pos_positive[0];
        if (s[a] == 1) {
            vector<int> d(N, 0);
            d[msd] = 1;
            d[a] = 1;
            string ans;
            for (int i = N - 1; i >= 0; --i) ans.push_back(char('0' + d[i]));
            answer_string(ans);
        } else {
            answer_minus_one();
        }
    }

    answer_minus_one();
    return 0;
}