func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     string s, s1 =   , s2 =   ;     cin >> n >> s;     reverse(s.begin(), s.end());     for (int i = 0; i < s.size(); ++i) {       if (i % 2 == 0)         s1 += s[i];       else         s2 += s[i];     }     reverse(s1.begin(), s1.end());     cout << s2 << s1;     return 0;   }   