import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int L = scan.nextInt();
		int N = scan.nextInt();
		String []S = new String[N];
		for(int i = 0; i < N; i++) {
			S[i] = scan.next();
		}
		scan.close();
		int ans = (int)Math.pow(2, L - 3) * N;
		System.out.println(ans);

	}
}