#include <iostream>
using namespace std;

int main() {
  int N, K;
  cin >> N >> K;
  int n = 1, k = 1;
  for (int i = 0; i < N; ++i)
    n *= 2;
  for (int i = 0; i < K; ++i)
    k *= 2;
  cout << n / k << endl;
}