#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];
        }
        if(queries.size() == MAX_QUERIES) {
            cout << "! " << rng() % 2 << endl;
            exit(0);
        }
        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');
    }
    string T = S;
    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 ;
        }
        // stable_sort(other.begin(), other.end(), [&](int x, int y) -> bool {
        //     T[x] = '1';
        //     auto ask_x = Ask(T);
        //     T[x] = '0';
        //     T[y] = '1';
        //     auto ask_y = Ask(T);
        //     T[y] = '0';
        //     return ask_x < ask_y;
        // });
        random_shuffle(other.begin(), other.end(), rng);
        for(auto u: other) {
            T[u] = '1';
            int u_value = Ask(T);
            T[u] = '0';
            S[u] = '1';
            int u_and_s = Ask(S);
            S[u] = '0';
            int s_value = Ask(S);
            int inter = s_value + u_value - u_and_s;
            if(inter != 0) {
                S[u] = '1';
                break;
            }
        }
    }
    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;
}

In file included from /usr/include/c++/13/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
                 from answer.code:2:
/usr/include/c++/13/bits/stl_algo.h: In instantiation of ‘void std::random_shuffle(_RAIter, _RAIter, _Generator&&) [with _RAIter = __gnu_cxx::__normal_iterator<int*, vector<int> >; _Generator = mersenne_twister_engine<long unsigned int, 32, 624, 397, 31, 2567483615, 11, 4294967295, 7, 2636928640, 15, 4022730752, 18, 1812433253>&]’:
answer.code:102:23:   required from here
/usr/include/c++/13/bits/stl_algo.h:4636:55: error: no match for call to ‘(std::mersenne_twister_engine<long unsigned int, 32, 624, 397, 31, 2567483615, 11, 4294967295, 7, 2636928640, 15, 4022730752, 18, 1812433253>) (__gnu_cxx::__normal_iterator<int*, std::vector<int> >::difference_type)’
 4636 |           _RandomAccessIterator __j = __first + __rand((__i - __first) + 1);
      |                                                 ~~~~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/random:53,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:179:
/usr/include/c++/13/bits/random.tcc:453:5: note: candidate: ‘std::mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type std::mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::operator()() [with _UIntType = long unsigned int; long unsigned int __w = 32; long unsigned int __n = 624; long unsigned int __m = 397; long unsigned int __r = 31; _UIntType __a = 2567483615; long unsigned int __u = 11; _UIntType __d = 4294967295; long unsigned int __s = 7; _UIntType __b = 2636928640; long unsigned int __t = 15; _UIntType __c = 4022730752; long unsigned int __l = 18; _UIntType __f = 1812433253; result_type = long unsigned int]’
  453 |     mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d,
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  454 |                             __s, __b, __t, __c, __l, __f>::
      |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/random.tcc:453:5: note:   candidate expects 0 arguments, 1 provided