Day3Home6

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

namespace Home6
{
    class Program
    {
        static void Main(string[] args)
        {
            string message = " ";
            bool isSum = false;
            int arraySum = 0;
            int[] array = new int[0];


            do
            {
                message = Console.ReadLine();
                switch (message)
                {
                    case "sum":
                        for (int i = 0; i < array.Length; i++)
                        {
                            arraySum += array[i];
                        }
                        isSum = true;
                        break;
                    default:
                        int[] tempArray = new int[array.Length + 1];
                        for (int i = 0; i < array.Length; i++)
                        {
                            tempArray[i] = array[i];
                        }
                        tempArray[tempArray.Length-1] = Convert.ToInt32(message);
                        array = tempArray;
                        break;
                }
            } while (isSum != true);
            Console.WriteLine(arraySum);
        }
    }
}