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