05. Firm

using System;

namespace Firm
{
    class Program
    {
        static void Main(string[] args)
        {
            double hour = double.Parse(Console.ReadLine());
            double day = double.Parse(Console.ReadLine());
            double workers = double.Parse(Console.ReadLine());
            double firmHour = Math.Floor (day * 8 * 0.9 + (2 * day * workers));
            if (hour > firmHour)
            {
                Console.WriteLine($"Not enough time!{Math.Floor(hour - firmHour)} hours needed.");
            }
            else
            {
                Console.WriteLine($"Yes!{Math.Floor(firmHour - hour)} hours left.");
            }
        }
    }
}