import java.util.*;
 
 
public class Main {
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int l = sc.nextInt();
    	int n = sc.nextInt();
    	
    	for(int i = 0; i < n; i++) {
    		sc.next();
    	}
    	
    	l -= 3;
    	
    	long sum = (long)Math.pow(2, l);
    	
    	sum *= n;
    	System.out.println(sum);
    }
}