#include <algorithm>
#include <vector>
#include <cfloat>
#include <string>
#include <cmath>
#include <set>
#include <cstdlib>
#include <map>
#include <ctime>
#include <iomanip>
#include <functional>
#include <deque>
#include <iostream>
#include <cstring>
#include <queue>
#include <cstdio>
#include <stack>
#include <climits>
#include <sys/time.h>
#include <cctype>

using namespace std;

typedef long long ll;

int main() {
  ll l, n;
  cin >> l >> n;
  string s[n];
  for (int i = 0; i < n; i++) {
    cin >> s[i];
  }
  std::cout << (1<<(l-3))*n << std::endl;
}