func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize( O2 )   using namespace std;   const int MAX = 2e5 + 5;   const long long MAX2 = 11;   const int MOD = 1000000000 + 7;   const long long INF = 20000;   const int dr[] = {1, 0, -1, 0, 1, 1, -1, -1};   const int dc[] = {0, 1, 0, -1, 1, -1, 1, -1};   const double pi = acos(-1);   long long n, h, ans;   bool st, ada;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     cin >> h >> n;     n--;     for (int i = (int)h - 1; i >= (int)0; i--) {       ada = (1ll << i) & n;       if (ada ^ st)         ans += (1ll << (i + 1));       else         ans++, st ^= 1;     }     cout << ans <<   n ;     return 0;   }   