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


namespace Problem_1001
{
    class Program
    {
        static void Main(string[] args)
        {

            ulong[] input = new ulong[4];
            for (int i = 0; i < input.Length; i++)
            {
                input[i] = ulong.Parse(Console.ReadLine());
            }

            for (int i = input.Length - 1; i >= 0; i--)
            {

                Console.WriteLine(String.Format("{0:F4}",Math.Sqrt(input[i])));
            }

            //Console.ReadLine();
        }
    }
}

You think there are exactly 4 numbers in the input. Also you think there is 1 number per line.
Please show task fragment describing input format as you think.

Edited by author 16.06.2016 21:02