List\Gauss' Trick

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

namespace fundamental14
{
    class MainClass
    {
        public static void Main()
        {

        List<double> number = Console.ReadLine().Split().Select(double.Parse).ToList();

       List<double> list = new List<double>();

       for (int i = 0; i < number.Count / 2; i++)
         {
         double sumNumber = number[i] + number[number.Count - 1 - i];
            list.Add(sumNumber);
         }

         if (number.Count % 2 == 1)
         {
            list.Add(number[number.Count / 2]);
         }

         Console.WriteLine(string.Join(" ", list));
        }
    }
}