Fold and Sum - Arrays

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


public class Program
{
	public static void Main()
	{
		int[] nums = Console.ReadLine().Split().Select(int.Parse).ToArray();

		int fourK = nums.Length;

		int firstK = fourK/4;
		int midK = fourK/2;
		int lastK = fourK/4;

		List<int> firstKs = new List<int>();

		for (int i=0; i<firstK; i++)
		{
			firstKs.Add(nums[i]);
		}

		firstKs.Reverse();

		List<int> midKs = new List<int>();

		for (int i=firstK; i<firstK+midK; i++)
		{
			midKs.Add(nums[i]);
		}

		List<int> lastKs = new List<int>();

		for (int i= nums.Length-1; i>=midK + lastK; i--)
		{
			lastKs.Add(nums[i]);
		}

		 firstKs.AddRange(lastKs);

		List<int>result = new List<int>();

		for (int i=0; i<midKs.Count; i++)
		{
			int num = firstKs[i] + midKs[i];
			result.Add(num);
		}
		Console.WriteLine(string.Join(" ",result));

	}
}