#include <iostream>
#include <cstdio>
#include <cstring>
#include <vector>
#include <deque>
#include <queue>
#include <array>
#include <set>
#include <map>
#include <cmath>
#include <complex>
#include <algorithm>
#include <numeric>
#include <utility>
#include <tuple>
#include <functional>
#include <bitset>
#include <cstdint>
#include <cassert>
#include <random>

using namespace std;
using i64 = int64_t;
using i32 = int32_t;

int main() {
    int n;
    cin >> n;
    vector<int> res;
    for (int i = 1; i <= n; ++i) {
        cout << "? " << n - 1 << '\n';
        for (int j = 1; j <= n; ++j) {
            if (j == i) continue;
            cout << j << ' ';
        }
        cout << endl;
        char c;
        cin >> c;
        if (c == '0') {
            res.push_back(i);
        }
    }
    cout << "! " << res.size() << '\n';
    for (int x : res) cout << x << ' ';
    cout << endl;
    return 0;
}