#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios::sync_with_stdio(false); cin.tie(0);
  int n, k;
  cin >> n >> k;
  if (k == 0) {
    cout << (int) pow(2, n) << endl;
    return 0;
  }
  int t = pow(2, k);
  int ans = 0;
  int v = pow(2, n);
  while ((ans + 1) * t <= v) ans++;
  cout << ans << endl;
  return 0; 
}