func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 100000;   long long n, ans;   int main() {     while (~scanf( %lld , &n)) {       n--;       int l = 0;       for (int i = 0; i < 50; i++)         if ((1ll << i) & n) l = i;       ans = n / 2 + n % 2;       int f = l;       for (; f > 0; f--) {         if ((1ll << f) & n) {           int k = f;           ans += (1ll << f);           for (int i = 1; i < k; i++) {             ans += (1ll << i) * (1ll << (k - 1 - i));           }         }       }       printf( %lld n , ans);     }     return 0;   }   