func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string s, soln;     cin >> s;     soln = s;     for (int i = 0, idx = (n - 1) / 2; i < n; i++) {       soln[idx] = s[i];       if ((n + i) % 2 == 0)         idx += (i + 1);       else if ((n + i) % 2 == 1)         idx -= (i + 1);     }     cout << soln << endl;     return 0;   }   