import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();

		boolean[] b = new boolean[n];
		int k = 0;
		for (int i = 0; i < n; i++) {
			System.out.println("? " + (n - 1));
			StringBuilder sb = new StringBuilder();
			for (int j = 0; j < n; j++) {
				if (i != j) {
					sb.append(j + 1).append(' ');
				}
			}
			sb.deleteCharAt(sb.length() - 1);
			System.out.println(sb.toString());

			int ans = sc.nextInt();
			if (ans == 0) {
				k++;
				b[i] = true;
			}
		}
		sc.close();

		System.out.println("! " + k);
		StringBuilder sb = new StringBuilder();
		for (int j = 0; j < n; j++) {
			if (b[j]) {
				sb.append(j + 1).append(' ');
			}
		}
		sb.deleteCharAt(sb.length() - 1);
		System.out.println(sb.toString());
	}
}