#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {

	int L, N;
	string S[8];
	cin >> L >> N;
	long long sum = 0;
	for (int i = 0; i < N; i++) {
		cin >> S[i];
		sum += (1 << (L - 3));
	}

	cout << sum << endl;

	return 0;
}