Progr-Fundamentals-Lists - 06. Square Numbers

using System;
using System.Collections.Generic;
using System.Linq;
namespace _06a_Lists_Lab
{
    class Lists_Lab
    {
      static void Main(string[] args)
        {
            List<int> numList = Console.ReadLine().Split(new char[] {' '}, StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToList();
            List<int> squareNumbers = new List<int>();

            for (int i = 0; i < numList.Count; i++)
            {
                if (Math.Sqrt(numList[i]) == (int)Math.Sqrt(numList[i]))
                {
                    squareNumbers.Add(numList[i]);
                }
            }
            squareNumbers.Sort((a, b) => b.CompareTo(a));
            Console.WriteLine(string.Join(" ", squareNumbers));
        }
    }
}