#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
cin>>n;
int k[100];
for(int i=0;i<n;i++)
cin>>k[i];
int a=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;}
a=min(a,t);
}
cout<<a<<endl;
return 0;
}
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