func_code_string: #include <bits/stdc++.h>   using namespace std;   bool cmp(long long int a, long long int b) { return b < a; }   int main() {     long long int n;     cin >> n;     long long int a[n + 1];     for (int i = 1; i <= n; i++) {       scanf( %lld , &a[i]);     }     sort(a + 1, a + n + 1, cmp);     long long int ans = 0;     a[0] = 0;     for (int i = 1; i <= n / 4; i++) {       a[i] += a[i - 1];     }     for (int i = 1; i <= n / 4; i = i * 4) {       ans += a[i];     }     for (int i = n / 4; i <= n; i++) {       ans += a[i];     }     cout << ans << endl;   }   