08._Condense_Array_to_Number

using System;
using System.Linq;

namespace _08._Condense_Array_to_Number
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = Console.ReadLine().Split(" ", StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToArray();
            int[] newArr = new int[arr.Length];
            int k = 1;

            while (arr.Length > k)
            {
                for (int i = arr.Length-1; i > 0; i--)
                {
                    for (int j = 0; j < i; j++)
                    {
                        newArr[j] = arr[j] + arr[j + 1];
                        arr[j] = newArr[j];

                    }
                    k++;

                }

            }
            Console.WriteLine(arr[0]);

        }
    }
}