func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve(string s, int n) {     if (s.size() <= 3) {       cout << s;       return;     }     cout << s.substr(0, 2) <<  - ;     s = s.substr(2, n - 2);     solve(s, n);   }   int main() {     int n;     cin >> n;     string s;     cin >> s;     solve(s, n);   }   