Three brothers

using System;

namespace  ThreeBrothers
{
    class Program
    {
        static void Main(string[] args)
        {
            double firstTime = double.Parse(Console.ReadLine());
            double secondTime = double.Parse(Console.ReadLine());
            double thirdTime = double.Parse(Console.ReadLine());
            double fatherTime = double.Parse(Console.ReadLine());

            double cleaningTime = 1 / (1 / firstTime + 1 / secondTime + 1 / thirdTime) * 1.15;
            double timeLeft = fatherTime - cleaningTime;

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