Project

using System;

namespace TimeForProject
{
    class Program
    {
        static void Main(string[] args)
        {
            int time = int.Parse(Console.ReadLine());
            int days = int.Parse(Console.ReadLine());
            int workers = int.Parse(Console.ReadLine());
            var workDays = days * 0.9*8;
            var overTime = days * 2 * workers;
            var workHours = Math.Truncate(overTime + workDays);

            if (workHours >= time)
            {
                Console.WriteLine($"Yes!{workHours - time} hours left.");
            }
            else
            {
                Console.WriteLine($"Not enough time!{time - workHours} hours needed. ");
            }

        }
    }
}