SqrtNumsArr

using System;
using System.Linq;

namespace SqurtNums
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = Console.ReadLine()
                .Split(" ", StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse)
                .Where(x => Math.Sqrt(x) % 1 == 0)
                .ToArray();

            Console.WriteLine(string.Join(" ", arr));

        }
    }
}