Dodowanie

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

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] suma = new string[1001];
            Console.WriteLine("Pedkic");
            int szetczik = 0;
            int x = Int32.Parse(Console.ReadLine());

            for (int i = 0; i < x; i++)
            {
                Console.WriteLine("Priv");
                string[] z1 = new string[1000];

                for(int l1 = 0; l1 < z1.Length; l1++)
                {
                    z1[l1] = Console.ReadLine();
                }
                Console.WriteLine("Pierwsza liczba : " + z1);

                string[] z2 = new string[1000];
                for (int l2 = 0; l2 < z2.Length; l2++)
                {
                    z2[l2] = Console.ReadLine();
                }
                Console.WriteLine("Pierwsza liczba : " + z2);

                int koniec;
                for(koniec = 0; z1[koniec] != null && z2[koniec] != null; koniec++)
                {
                }

                for(int j = koniec; z1[j] != null && z2[j] != null; j--)
                {
                    int k1 = Int32.Parse(z1[j]);
                    int k2 = Int32.Parse(z2[j]);
                    int k0 = k1 + k2 + szetczik;
                    szetczik = 0;

                    if(k0 >= 10)
                    {
                        int l = k0 - 10;
                        suma[koniec + 1] = Convert.ToString(l);
                        szetczik++;
                    }
                }
                Console.WriteLine("Suma: " + suma);
            }


        }
    }
}