#include <iostream>
using namespace std;
 
int main() {
    int n;
    cin >> n;
 
    int k[100]; // Number of people in each line
    for (int i = 0; i < n; i++) {
        cin >> k[i];
    }
 
    int times[100]; // Total time for each line
 
    // Process each cashier line
    for (int i = 0; i < n; i++) {
        times[i] = 0;
        for (int j = 0; j < k[i]; j++) {
            int m;
            cin >> m;
            times[i] += 5 * m + 15;
        }
    }
 
    // Find the minimum time
    int minTime = times[0];
    for (int i = 1; i < n; i++) {
        if (times[i] < minTime) {
            minTime = times[i];
        }
    }
 
    cout << minTime << endl;
 
    return 0;
}

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NAoxIDQgMyAyCjEwMAoxIDIgMiAzCjEgOSAxCjcgOAo=

4
1 4 3 2
100
1 2 2 3
1 9 1
7 8