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

int except_query(int a, int n) {
    cout << "? " << n-1 << "\n";
    int count = 0;
    for (int i = 1; i <= n; i++) {
        if (i == a) continue;
        if (count) cout << " ";
        cout << i;
        count++;
    }
    cout << "\n" << flush;
    int ans; cin >> ans;
    return ans;
}

void answer(vector<int> &ans) {
    cout << "! " << ans.size() << "\n";
    for (int i = 0; i < ans.size(); i++) {
        if (i) cout << " ";
        cout << ans[i];
    }
    cout << "\n";
}

int main() {
    int n; cin >> n;
    vector<int> ans;
    for (int i = 1; i <= n; i++) {
        if (!except_query(i, n)) ans.emplace_back(i);
    }
    answer(ans);
    return 0;
}