#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;
    int k[100];
    for (int i = 0; i < n; i++) cin >> k[i];

    int ans = 1e9;
    for (int i = 0; i < n; i++) {
        int t = 0, x;
        for (int j = 0; j < k[i]; j++) {
            cin >> x;
            t += x * 5 + 15;
        }
        ans = min(ans, t);
    }

    cout << ans << endl;
    return 0;
}