func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int T;     T = 1;     while (T--) {       int n;       cin >> n;       vector<int> v;       int c = 0;       for (int i = 0; i < n; i++) {         int in;         cin >> in;         if (in == 5) {           c++;         }         v.push_back(in);       }       int nn = c / 9;       if (c == n) {         cout <<  -1  << endl;       } else {         string s =   ;         if (nn == 0) {           cout <<  0  << endl;         } else {           for (int i = 0; i < nn * 9; i++) {             s = s +  5 ;           }           for (int i = 0; i < n - c; i++) {             s = s +  0 ;           }           cout << s << endl;         }       }     }     return 0;   }   