#include <stdio.h>

int p2(int x){
	int i,r=1;
	for(i = 1;i <= x;i++){r*=2;}
	return r;
}

int main(void) {
	int l,n,i,r;
	char s[4];
	scanf("%d%d",&l,&n);
	for(i = 1;i <= n;i++){scanf("%s",s);}
	r = p2(l-3);
	printf("%d\n",r*n);
	return 0;
}