04. Fold and Sum

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

namespace Exam_Shopping
{
    class Program
    {


        static void Main(string[] args)
        {
            int[] arr = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int len = arr.Length;
            int[] left = arr.Take(len / 4).Reverse().ToArray();
            int[] right = arr.Reverse().Take(len / 4).ToArray();
            int[] upArr = left.Concat(right).ToArray();
            int[] bArr = arr.Skip(len / 4).Take(len / 2).ToArray();
            int[] sum = upArr.Select((x, i) => x + bArr[i]).ToArray();
            Console.WriteLine(string.Join(" ", sum));
        }
    }
}