ArrLab - Extract Middle 1, 2 or 3 Elements

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

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] input = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int lenght = input.Length;
            if (lenght == 1)
            {
                Console.WriteLine($"{{ {input[0]} }}");
            }
            else if (lenght % 2 == 0)
            {
                Console.WriteLine($"{{ {input[lenght/2-1]} {input[lenght / 2]} }}");
            }
            else
            {
                Console.WriteLine($"{{ {input[lenght / 2 - 1]} {input[lenght / 2]} {input[lenght / 2 + 1]} }}");
            }
    }
    }
}