Здравейте,

Условието е: Read a list of integers and extract all square numbers from it and print them in descending order. A square number is an integer which is the square of any integer. For example, 1, 4, 9, 16 are square numbers.

Получавам в Judge само 75 точки. Защо?

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

namespace _6
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> spis = Console.ReadLine().Split(' ').Select(int.Parse).OrderByDescending(a => a).ToList();
            foreach (var item in spis)
            {
                double help = Math.Sqrt(item);
                if ( help * help == item)
                    Console.Write(item + " ");
            }
        }
    }
}