Новогодишно парти; New Years Eve Party

using System;

namespace tESt
{
    class Program
    {
        static void Main(string[] args)
        {
            var guests = int.Parse(Console.ReadLine());
            var budget = double.Parse(Console.ReadLine());

            var ticketsPrice = guests * 20;   //400
            var diff = budget - ticketsPrice; // 600
            var fireworks = diff * 0.40;   // = 240 лв
            var donation = diff - fireworks;

            if (diff >= 0)
            {
                Console.WriteLine($"Yes! {fireworks:f0} lv are for fireworks and {donation:f0} lv are for donation. ");
            }
            else
            {
                diff = Math.Abs(diff);
                Console.WriteLine($"They won't have enough money to pay the covert. They will need {diff:f0} lv more.");
            }
        }
    }
}