#include<iostream>
#include<string>
#include<algorithm>
#include<functional>
#include<vector>
#include<stack>
#include<queue>
#include<set>
#include<map>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
using namespace std;

int l, n;

signed main() {
	cin >> l >> n;
	cout << (1<<(l-3)) * n << endl;
	return 0;
}