Can anyone explain why this is saying wrong answer?

namespace Ex2
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] input = Console.ReadLine().Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);

            for (int a = input.Length - 1; a >= 0; a--)
            {
                double temp = Math.Sqrt(double.Parse(input[a]));

                if (temp == 0)
                {
                    string zero = temp.ToString();
                    zero += ",";
                    Console.WriteLine(zero.PadRight(6,'0'));
                }
                else
                {
                    Console.WriteLine(temp);
                }
            }

            //Console.ReadLine();
        }
    }
}

How many input lines are declared in the task?
How many input lines in the example?
How many lines your program expects?