#include <complex.h>
#include <bits/stdc++.h>

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pi pair<int, int>
#define pb push_back

using namespace std;
using ll = long long;

template<typename T_container, typename T = typename enable_if
    <!is_same<T_container, string>::value, typename
    T_container::value_type>::type>

ostream& operator<<(ostream &os, const T_container &v) {
    os << '{';
    string sep;
    for(const T &x : v) {
        os << sep << x;
        sep = ", ";
    }
    return os << '}';
}


void dbg_out(){cerr<<endl;}
template <typename Head, typename... Tail>void dbg_out(Head H
    , Tail... T){cerr << ' ' << H; dbg_out(T...); }

#define dbg(...) dbg_out(__VA_ARGS__)

// #define TEST_CASES
#define vt vector

const int amax = 12;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void get() {
    int n = 200;
    double res = 0;
    for(int i = 1; i < n; ++i) {
        double P = 1;
        for(int j = 1; j <= i; ++j) {
            P /= i;
            res += P * j;
            P *= (i-1);
        }
    }
    cout << 2 * res << '\n';
}

const int MAX_QUERIES = 3500;

void solve() {
    int n; cin >> n;
    map<string, int> queries;
    auto Ask = [&](string s) -> int {
        if(queries.count(s)) {
            return queries[s];
        }
        assert(queries.size() < MAX_QUERIES);
        cout << "? " << s << endl;
        fflush(stdout);
        int ret; cin >> ret;
        return queries[s] = ret;
    };
    string S;
    for(int i = 0; i < n; ++i) {
        S.push_back('0');
    }
    for(int i = 0; i < n; ++i) {
        S[i] = '1';
        if(Ask(S) == 0) {
            cout << "NO\n";
            return ;
        }
        S[i] = '0';
    }
    S[rng() % n] = '1';
    for(int i = 1; i < n; ++i) {
        vt<int> other;
        for(int j = 0; j < n; ++j) if(S[j] == '0') {
            other.push_back(j);
        }
        int value = Ask(S);
        if(value == n - i) {
            break;
        }
        if(value == 0) {
            cout << "! 0" << endl;
            fflush(stdout);
            return ;
        }
        shuffle(other.begin(), other.end(), rng);
        string T = S;
        for(auto &x: T) {
            x = '0' + (1 - (x - '0'));
        }
        for(auto to: other) {
            T[to] = '0';
            if(Ask(T) <= value) {
                S[to] = '1';
                break;
            }
            T[to] = '1';
        }
    }
    cout << "! 1" << endl;
    fflush(stdout);
}

int main() {
    // cin.tie(0)->sync_with_stdio(0);
int tt = 1;
#ifdef TEST_CASES
    cin >> tt;
#endif
    while(tt--)
        solve();
    return 0;
}