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

#define reps(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,n)   reps(i,0,n)
#define all(x) (x).begin(),(x).end()
#define INF (1000000001)
#define MOD (1000000007)
#define PI (acos(-1))

int main(){
  int N,K;
  cin >> N >> K;
  int x=pow(2,K);
  int y=pow(2,N);
  cout << y/x << endl;
}