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