func_code_string: #include <bits/stdc++.h>   using namespace std;   const int Z = (int)3e3 + 111;   const int N = (int)1e6 + 111;   const int INF = (int)1e9 + 111;   const int MOD = (int)1e9 + 7;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     string t, ans;     cin >> t;     int k;     if (t.size() % 2)       k = 1;     else       k = 0;     int po1(0), po2(t.size() - 1);     while (ans.size() != t.size()) {       if (k) {         ans = t[po1] + ans;         po1++;       } else {         ans = t[po2] + ans;         po2--;       }       k = !k;     }     cout << ans;     return 0;   }   