firm

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace silvanadoc
{
    class silvanadoc
    {
        static void Main(string[] args)
        {
            int hoursNeeded = int.Parse(Console.ReadLine());
            int daysAvailable = int.Parse(Console.ReadLine());
            int workersOvertime = int.Parse(Console.ReadLine());

            var hoursWorking = (daysAvailable * 0.90) * 8;
            var overtimeHours = workersOvertime * (2 * daysAvailable);
            var allHours = Math.Floor(hoursWorking) + overtimeHours;
            var hoursLeft = Math.Floor(allHours) - hoursNeeded;
            var hoursMore = hoursNeeded - allHours;

            if (allHours >= hoursNeeded)
            {
                Console.WriteLine($"Yes!{Math.Floor(hoursLeft)} hours left.");
            }
            else
            {
                Console.WriteLine($"Not enough time!{Math.Floor(hoursMore)} hours needed.");
            }


        }
    }
}