a.cpp

#include <bits/stdc++.h>

using namespace std;

int main(int argc, char *argv[])
{
  int n;
  cin>>n;
  double ans=0;
  for (int i=0; i < n; i++) {
    int a,b,c,d,e;
    cin>>a>>b>>c>>d>>e;
    ans=max(ans,a+b+c+d+(e*(110.0/900.0)));
  }
  //  cout<<ans<<endl;
  printf("%.6lf\n",ans);
  return 0;
}