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

int main() {
	int N, K; cin >> N >> K;

	long long int cnt = 0;
	for (long long int x = 1; x <= pow(2, N); x++) {
		long long int a = pow(2, K);
		if (x%a == 0) {
			cnt++;
		}
	}

	cout << cnt << endl;
}