#include <iostream>
using namespace std;
 
int main() {
    int n;
    cin >> n;
 
    int minTime = 1e9; // A large value to track the minimum time
 
    for (int i = 0; i < n; i++) {
        int k;
        cin >> k;  // Number of people in the current cashier's queue
 
        int totalTime = 0;
        for (int j = 0; j < k; j++) {
            int m;
            cin >> m;  // Number of items the j-th person has
 
            totalTime += 5 * m + 15;  // 5 seconds per item + 15 seconds per customer
        }
 
        // Add Vasya's own time: He has no items, so only 15 seconds to check out
        totalTime += 15;
 
        minTime = min(minTime, totalTime);  // Update the minimum time
    }
 
    cout << minTime << endl;  // Output the minimum waiting time
 
    return 0;
}
 

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