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

int main() {
  int l, n;
  cin >> l >> n;
  string tmp;
  for (int i = 0; i < n; ++i) cin >> tmp;

  ll ans = pow(2LL, (ll)l - 3);
  ans *= n;
  cout << ans << '\n';
  return 0;
}