#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define vi vector<int>
#define vll vector<long long>
#define MOD 1000000007
#define endl '\n'
typedef long long ll;
void print(vi v){
cout<<"Contents of vector:\n";
for(auto x : v) cout<<x<<" ";
cout<<endl<<endl;
}
void solve(){
ll n, k; cin>>n>>k;
string s = "";
k--;
for(int i = 0; i<n; i++){
if (k & (1<<i)) {
s += '1';
} else {
s += '0';
}
}
//reverse(all(s));
//cout<<"S: "<<s<<endl;
ll ans = stoll(s, nullptr, 2);
cout<<ans+1<<endl;
}
int main() {
ios_base::sync_with_stdio(false); cin.tie(nullptr);
//ifstream cin("input.txt"); ofstream cout("output.txt");///cia failai
//int T; cin>>T;
int T = 1;
for(int it = 1; it<=T; it++){
solve();
}
}
