func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long int n;     cin >> n;     vector<long long int> v;     for (long long int i = 0; i < n; i++) {       long long int x;       cin >> x;       v.push_back(x);     }     long long int z;     long long int count = 1;     for (long long int i = 0;; i++) {       if (n == count) {         z = i;         break;       } else         count *= 4;     }     sort(v.begin(), v.end());     reverse(v.begin(), v.end());     long long int prev = 0;     long long int end = 1;     vector<long long int> ans;     while (prev < n) {       long long int sum = 0;       for (long long int j = prev; j < end; j++) sum += v[j];       ans.push_back(sum);       sum = 0;       prev = end;       end *= 4;     }     long long int fin = 0;     long long int calc = z + 1;     for (long long int j = 0; j < ans.size(); j++) {       fin += ans[j] * calc;       calc--;     }     cout << fin;     return 0;   }   