#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<ll> vl;
typedef long double ld;
typedef vector<ld> vd;
typedef bool bl;
typedef vector<bl> vb;
typedef unordered_map<ll,unordered_map<ll,ll>> graph;

const ll e5 = 1 << 20;
const ll mod = 998244353;
const ll e3 = 1 << 13;
const ll INF = 1ll << 60;

ll n,k;

int main(){
  cin >> n >> k;
  ll x = 2;
  ll y = 2;
  for(ll i = 0;i < n;i++){
    x *= 2;
  }
  for(ll i = 0;i < k;i++){
    y *= 2;
  }
  cout << x/y << endl;

}