#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

int main(){
  ll L, N; cin >> L >> N;
  ll ans;
  if(L == 3) ans = N;
  else{
    ans = 1;
    int i = 3;
    while(i < L){
      ans *= 2;
      i++;
    }
    ans *= N;
  }
  cout << ans << endl;
}