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

namespace kertotaulu
{
    class kertotaulu
    {



        public static void Main(string[] args)
        {
            int rivi, sarake;

            while (true)
            {
                LueRivitJaSarakkeet(out  rivi, out  sarake);
                TulostaTaulukko(LuoTaulukko(rivi, sarake));
            }




        }

        public static void LueRivitJaSarakkeet(out int rivi, out int sarake)
        {
            bool huijaabottia = false;

            Console.WriteLine("Anna taulun rivien määrä: ");
            bool success = int.TryParse(Console.ReadLine(), out rivi);
            if (!success || rivi <= 0)
            {
                huijaabottia = true;

            }
            Console.WriteLine("Anna taulun sarakkeiden määrä: ");
            success = int.TryParse(Console.ReadLine(), out sarake);
            if (!success || sarake <= 0)
            {
                huijaabottia = true;

            }

            if(huijaabottia)
                System.Environment.Exit(1);

            Console.Write("\n");

        }

        public static int[,] LuoTaulukko(int rivi, int sarake)
        {
            int[,] taulu = new int[rivi, sarake];

            for (int r = 0; r < taulu.GetLength(0); r++)
            {
                for (int s = 0; s < taulu.GetLength(1); s++)
                {
                    taulu[r, s] = (r + 1) * (s + 1);
                }

            }


            return taulu;
        }

        public static void TulostaTaulukko(int[,] taulukko)
        {
            int sarake = 1, rivi = 1;
          //  Console.Write("   ");
            while(sarake <= taulukko.GetLength(1))
            {
                Console.Write("{0} ", sarake);
                sarake++;
            }
            Console.Write("\n");
            Console.Write("\n");

            for (int r = 0; r < taulukko.GetLength(0); r++)
            {
                Console.Write("{0} ", rivi);
                rivi++;
                for (int s = 0; s < taulukko.GetLength(1); s++)
                {
                    Console.Write("{0} ", taulukko[r, s]);
                }
                Console.Write("\n");
            }
            Console.Write("\n");
        }
    }
}