06. Square Numbers

using System;
using System.Collections.Generic;
using System.Linq;

namespace _06._Square_Numbers
{
    class SquareNumbers
    {
        static void Main(string[] args)
        {
            List<int> numbers = Console.ReadLine()
                .Split(' ')
                .Select(s => int.Parse(s))
                .ToList();

            List<int> selected = numbers.Where(num => Math.Sqrt(num) == (int)Math.Sqrt(num)).ToList();

            selected = selected.OrderByDescending(a => a).ToList();
            Console.WriteLine(string.Join(" ", selected));
        }
    }
}