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)
        {
            var firstBrotherTime = double.Parse(Console.ReadLine());
            var secondBrotherTime = double.Parse(Console.ReadLine());
            var thirdBrotherTime = double.Parse(Console.ReadLine());
            var fatherOnFishing = double.Parse(Console.ReadLine());
            var allBrothersTimeSum = 1 / ((1 / firstBrotherTime) + (1 / secondBrotherTime) + (1 / thirdBrotherTime));
            var timeWithBreak = allBrothersTimeSum + (allBrothersTimeSum * 0.15);
            var timeLeft = fatherOnFishing - timeWithBreak;
            if (timeLeft > 0 && timeLeft < 100)
            {
                Console.WriteLine(string.Format("Cleaning time: " + (Math.Round(timeWithBreak, 2))));
                Console.WriteLine(string.Format("Yes, there is a surprise - time left -> " + timeLeft + "hours"));
            }
            else
            {
                Console.WriteLine(string.Format("Cleaning time: " + (Math.Round(timeWithBreak, 2))));
                Console.WriteLine(string.Format("No, there isn't a surprise - shortage of time - > " + (Math.Ceiling(timeLeft)) + "hours"));
            }
        }
    }
}