#include <iostream>
using namespace std;
 
int main() {
    int n;
    cin >> n;
 
    int minTime = 1e9;
 
    // Process each cashier line
    for (int i = 0; i < n; i++) {
        int k;
        cin >> k;
 
        int line[100]; // Assuming maximum 100 people in line
        for (int j = 0; j < k; j++) {
            cin >> line[j]; // Number of items for each person
        }
 
        int totalTime = 0;
        for (int j = 0; j < k; j++) {
            totalTime += 5 * line[j] + 15; // 5 seconds per item + 15 seconds per person
        }
 
        if (totalTime < minTime) {
            minTime = totalTime;
        }
    }
 
    cout << minTime << endl;
 
    return 0;
}

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