func_code_string: #include <bits/stdc++.h>   using namespace std;   int32_t main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int64_t n, i;     cin >> n;     string s;     cin >> s;     string ans =   ;     ans = ans + s[0];     bool st = true;     if ((n - 1) & 1) {       st = false;     }     for (i = 1; i < n; i++) {       if (st) {         ans = s[i] + ans;         st = false;       } else {         ans = ans + s[i];         st = true;       }     }     cout << ans;     return 0;   }   