ImpressTheGirlfriend

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

/*
    First - Russian site selling games in rubles
    Second - American site selling games in dollars
    Third - Official sit of the game selling games in euros
    Fourth - Bulgarian site selling games in leva - B - 2 copies of the game for the price for one
    Fifth - Bulgarian site selling game in leva - M

    100 rubles = 3.5 leva
    1 dollar = 1.5 leva
    1 euro = 1.95 leva

    if spiro buys 2 special games from B site, he always sell one of them for exactly half of the money he paid for both
*/

class ImpressTheGirlfriend
{
    static void Main()
    {
        uint r = uint.Parse(Console.ReadLine());
        uint d = uint.Parse(Console.ReadLine());
        uint e = uint.Parse(Console.ReadLine());
        uint b = uint.Parse(Console.ReadLine());
        uint m = uint.Parse(Console.ReadLine());

        decimal rubles = (r / 100.0M) * 3.5M;
        decimal dollars = d * 1.5M;
        decimal euros = e * 1.95M;
        decimal bSiteInleva = b / 2;

        decimal[] allPrices = {rubles, dollars, euros, bSiteInleva, m};

        decimal mostExpensive = allPrices.Max();


        Console.WriteLine("{0:F2}", Math.Ceiling(mostExpensive));
    }
}