#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>

using namespace std;

#define int long long
#define endl "\n"

constexpr long long INF = (long long)1e18;
constexpr long long MOD = 1'000'000'007; 

string yn(bool f){return f?"Yes":"No";}
string YN(bool f){return f?"YES":"NO";}

signed main(){
	// cin.tie(nullptr);
	// ios::sync_with_stdio(false);
	// cout<<fixed<<setprecision(10);
	
	int N;
	vector<int> ans;
	
	cin>>N;
	
	for(int i = 1; i <= N; i++){
		bool flag = true, flag2 = false;
		
		cout<<"? "<<N-1<<endl;
		
		for(int j = 1; j <= N; j++){
			if(i == j) continue;
			
			if(flag2) cout<<" ";
			
			cout<<j;
			
			flag2 = true;
		}
		cout<<endl;
		cout<<flush;
		
		int a;
		
		cin>>a;
		
		if(!a) ans.push_back(i);
	}
	
	sort(ans.begin(), ans.end());
	
	cout<<"! "<<ans.size()<<endl;
	
	for(int i = 0; i < ans.size(); i++){
		if(i) cout<<" ";
		cout<<ans[i];
		cout<<flush;
	}
	cout<<endl;
	
	cout<<flush;
	return 0;
}