#include <iostream>
#include <cstdio>
#include <string>
#include <cstdlib>
#include <vector>
#include <algorithm>
#include <functional>
#include <iomanip>
#include <stdlib.h>
#include <math.h>
using namespace std;

int main()
{
	int n, k;
	cin >> n >> k;
	long long d = pow(2, n);
	long long e = pow(2, k);
	cout << d / e << endl;
}