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