SumEqualNumbers

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

namespace SumEqualNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            var numbers = Console.ReadLine()
                .Split(' ')
                .Where(x => x != "")
                .Select(int.Parse)
                .ToList();

            bool pairFound = true;

            while (pairFound)
            {
                for (int i = 0; i < numbers.Count - 1; i++)
                {
                    if(numbers[i] == numbers[i + 1])
                    {
                        //sum neighbors
                        int sum = numbers[i] + numbers[i + 1];
                        numbers[i] = sum;
                        numbers.RemoveAt(i + 1);
                        break;
                    }

                    if(i == numbers.Count - 2)
                    {
                        pairFound = false;
                    }
                }
            }

            Console.WriteLine(string.Join(" ", numbers));

        }
    }
}