using System;
public class Program
{
public static void Main()
var product = Console.ReadLine().ToLower();
var grad = Console.ReadLine().ToLower();
var kolichestvo = double.Parse(Console.ReadLine());
if (grad == "sofia")
if (product == "coffee")
{ Console.WriteLine(0.50*kolichestvo);}
}
if (grad == "varna")
{ Console.WriteLine(0.40*kolichestvo);}