01. Nacepin

using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
#if DEBUG
        Console.SetIn(new StreamReader("../../../input.txt"));
#endif
        decimal priceUS = decimal.Parse(Console.ReadLine());
        long weightUS = long.Parse(Console.ReadLine());
        decimal priceUK = decimal.Parse(Console.ReadLine());
        long weightUK = long.Parse(Console.ReadLine());
        decimal priceChina = decimal.Parse(Console.ReadLine());
        long weightChina = long.Parse(Console.ReadLine());

        decimal pricePerKgUS = (priceUS / weightUS) / 0.58m;
        decimal pricePerKgUK = (priceUK / weightUK) / 0.41m;
        decimal pricePerKgChina = (priceChina / weightChina) * 0.27m;

        decimal difference =
            Math.Max(pricePerKgUS, Math.Max(pricePerKgUK, pricePerKgChina))
            - Math.Min(pricePerKgUS, Math.Min(pricePerKgUK, pricePerKgChina));

        if (pricePerKgUS < Math.Min(pricePerKgUK, pricePerKgChina))
            Console.WriteLine($"US store. {pricePerKgUS:f2} lv/kg");
        else if (pricePerKgUK < pricePerKgChina)
            Console.WriteLine($"UK store. {pricePerKgUK:f2} lv/kg");
        else
            Console.WriteLine($"Chinese store. {pricePerKgChina:f2} lv/kg");

        Console.WriteLine($"Difference {difference:f2} lv/kg");
    }
}