import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		final int L = sc.nextInt();
		final int N = sc.nextInt();
		
		long count = 0;
		for(int i = 0; i < N; i++){
			final String S = sc.next();
			
			count += 1l << (L - 3);
		}
		
		System.out.println(count);
		
	}
	
}