#include <bits/extc++.h>

int main() {
    using namespace std;
    unsigned long N;
    cin >> N;
    vector<unsigned long> A(N);
    iota(begin(A), end(A), 1);
    mt19937_64 mt{random_device{}()};
    const auto cmp{[](unsigned long x){
        return [x](unsigned long y) -> bool {
            if(x == y)return 0;
            cout << "? " << y << " " << x << endl;
            unsigned long t;
            cin >> t;
            return t;
        };
    }};
    [rec_impl{[&A, &mt, &cmp](auto&& f, unsigned long l, unsigned long r) -> void {
        while(l + 1 < r){
            unsigned long d{uniform_int_distribution<unsigned long>{l, r - 1}(mt)};
            const auto m{partition(begin(A) + l, begin(A) + r, cmp(A[d])) - begin(A)};
            f(f, l, m);
            l = m;
        }
    }}, &N]{rec_impl(rec_impl, 0, N);}();
    cout << "!" << endl;
    cout << N - 1 << endl;
    for(const auto a : A)cout << a << " ";
    cout << endl;
    return 0;
}