#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;
}
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