Three brothers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Three_brothers
{
    class Program
    {
        static void Main(string[] args)
        {
            double timeA = double.Parse(Console.ReadLine());
            double timeB = double.Parse(Console.ReadLine());
            double timeC = double.Parse(Console.ReadLine());
            double timeD = double.Parse(Console.ReadLine());

            double workTime = ((1 / ((1 / timeA) + (1 / timeB) + (1 / timeC))) * 1.15);
            double timeLeft = timeD-workTime;

            if (timeLeft > 0)
            {
                Console.WriteLine($"Cleaning time: {workTime:f2}");
                timeLeft = Math.Floor(timeD-workTime);
                Console.WriteLine($"Yes, there is a surprise - time left -> {timeLeft} hours.");
            }
            else
            {
                Console.WriteLine($"Cleaning time: {workTime:f2}");
                double timeLeft1 = Math.Ceiling(Math.Abs(timeD-workTime));
                Console.WriteLine($"No, there isn't a surprise - shortage of time -> {timeLeft1} hours.");
            }

        }
    }
}