#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 2000000000


int main(){	
	
	int L,N;
	cin>>L>>N;
	
	long long ans = 1LL<<(L-3);
	ans *= N;
	
	cout<<ans<<endl;
	
	return 0;
	
}