#include <bits/stdc++.h>
using namespace std;

int main(){
    int L, N, i, ans;
    string tmp;
    vector <string> str;

    cin >> L >> N;
    for(i = 0; i < N; i++){
        cin >> tmp;
        str.push_back(tmp);
    }

    ans = pow(2, L - 3)*N;

    cout << ans << endl;

    return 0;
}