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

const long long INF = 1LL << 60;
#define MOD 1000000007;

typedef long long ll;

#define writeln(n) cout<<n<<endl;

typedef pair<int, int> P;

typedef pair<string, int> Psi;


int main() {

	int n,k;
	cin>>n>>k;

	ll ma = powl(2,n);

	ll t = powl(2,k);

	ll ans =0;

	for(ll i=t; i<=ma; i +=t){
		ans++;
	}

	writeln(ans);
}