using System;

public class Program

{

    public static void Main()

    {

            Console.WriteLine("izberi valuta - ETH, XRP или BTC");

            var valuta = Console.ReadLine();

            while (valuta != "ETH" && valuta != "XRP" && valuta != "BTC")

            {

                Console.WriteLine("Invalid currency");

                valuta = Console.ReadLine();

            }

            var EUR = int.Parse(Console.ReadLine());

            if(EUR>1000)

            {

                var minbroi = EUR + (10 / 100)*EUR;

​

            }

            var moneti = Math.Round(double.Parse(Console.ReadLine()), 3);

            if (valuta == "XRP")

            {

                if (moneti>1000 && moneti<2500)

                {

                    moneti = moneti + (5 / 100)*moneti;

                    if(moneti >= 2500)

                    {

                        moneti = moneti + (10 / 100)* moneti;

                    }

                }

            }

            if (valuta == "BTC")

            {

                if (moneti>10)

                {

                    moneti = moneti + (25 / 100);

                }

            }

            while (EUR < 1.0 || EUR > 1000000.0)

            {

                Console.WriteLine("Incorrect currency");

                EUR = int.Parse(Console.ReadLine());

            }

            var minmoneti = int.Parse(Console.ReadLine());

            if (EUR == minmoneti)

            {

                Console.WriteLine("Successfully purchased"+ moneti);

            }

            if (EUR != minmoneti)

            {

                Console.WriteLine("Insufficient funds");

            }

            if (valuta!="BTC" && valuta !="ETH" && valuta!="XRP")

            {

                Console.WriteLine("EUR to value is not supported");

            }

    }

}

​