func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, d, t[110], tot = 0;     cin >> n >> d;     for (int i = 0; i < n; i++) cin >> t[i], tot += t[i];     if (tot + (n - 1) * 10 > d)       cout << -1 << endl;     else {       cout << (n - 1) * 2 + (d - tot - (n - 1) * 10) / 5 << endl;     }     return 0;   }   