#include<iostream>
#include<string>
#include<string.h>
#include<algorithm>
#include<stdio.h>
#include<cmath>
#include<vector>
#include<utility>
#include<stack>
#include<queue>
#include<list>
#include<bitset>
#include<functional>

#define FOR(i, a, b) for(int i=(a);i<=(b);i++)
#define RFOR(i, a, b) for(int i=(a);i>=(b);i--)
#define MOD 1000000007
#define INF 1000000000
#define PI 3.14159265358979

using namespace std;
typedef pair<int, int> P;

int main(void) {
	long long int n, l;
	long long int p;
	
	cin >> l >> n;
	FOR(i, 1, n) {
		string s;
		cin >> s;
	}
	l -= 3;
	p = pow(2, l)*n;
	printf("%lld\n",p );
	return 0;
}