#include <iostream>
using namespace std;
typedef long long LL;
int main(int argc, char* argv[])
{
	int N,K;
	LL i;
	cin>>N>>K;
	LL x=1;
	for (i=1;i<=K;i++){
		x*=2;
	}
	LL X=1;
	for (i=1;i<=N;i++){
		X*=2;
	}
	LL ans=0;
	i=1;
	while (true){
		if (i*x<=X){
			ans++;
			i++;
		}else{
			break;
		}
	}
	cout<<ans<<endl;
	return 0;
}