cf 408A

#include<stdio.h>

int main()
{
    int n;
    scanf("%d", &n);

    int k[n], i, j, min = 9999999;
    for(i = 0; i < n; i++) scanf("%d", &k[i]);

    int s;
    for(i = 0; i < n; i++)
    {
        s = 0;
        int val = k[i];
        int m[val];
        for(j = 0; j < val; j++)
        {
            scanf("%d", &m[j]);
            s += 5 * m[j];
        }
        s += 15 * val;
        if(min >= s) min = s;
    }
    printf("%d\n", min);
}