#define _CRT_SECURE_NO_WARNINGS
#include "bits/stdc++.h"
using namespace std;
#define rep(i, n) for(int i=0; i<(n); ++i)
#define FOR(i, m, n) for(int i=(m); i<(n); ++i)
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
#define mp make_pair
#define pb push_back
#define Cout(x) cout << (x) << endl
#define dump(x) cerr << #x << " = " << (x) << endl;
typedef long long LL;
typedef vector<int> VI;
typedef vector<long long> VL;
typedef vector<string> VS;
typedef vector<vector<int>> VVI;
typedef pair<int, int> PII;
const int inf = (int)1e9;
const long long mod = (long long)1e9 + 7;
const double pi = acos(-1.0);

//a^n
long long Pow(long long a, long long n) {
	long long ans = 1;
	while (n > 0) {
		if (n & 1)ans *= a;
		a *= a; n >>= 1;
	}
	return ans;
}

int main() {
	LL n, k;
	cin >> n >> k;
	Cout(Pow(2, n) / Pow(2, k));
}