#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
using ll = long long;
using namespace std;
const int INF = 1e9;

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

    int ma = 1;
    rep(i, N) ma *= 2;

    int l = 1;
    rep(i, K) l *= 2;

    cout << ma / l << endl;


    return 0;
}