#include <bits/extc++.h>

int main() {
    using namespace std;
    unsigned long N;
    cin >> N;
    vector<unsigned long> A{0, 1, 10000};
    const auto query{[](auto i, auto j) -> bool {
        cout << "? " << i << " " << j << endl;
        unsigned long t;
        cin >> t;
        return t;
    }};
    for(unsigned long i{2}; i <= N; ++i){
        unsigned long l{0}, r{size(A) + 1};
        while(l + 1 < r){
            auto m{(l + r) / 2};
            (query(A[m], i) ? l : r) = m;
        }
        A.insert(begin(A) + l + 1, i);
    }
    A.pop_back();
    A.erase(begin(A));
    cout << "!" << endl;
    cout << N - 1 << endl;
    for(const auto a : A)cout << a << " ";
    cout << endl;
    return 0;
}