#include <bits/stdc++.h>
using namespace std;
int main(){
    int n, k;
    cin >> n >> k;
    vector<int> pow2(31);
    pow2[0] = 1;
    for(int i = 1; i <= 30; ++i)    pow2[i] = pow2[i - 1] * 2;
    int ans = pow2[n] / pow2[k];
    cout << ans << endl;
}