using System;

public class Program

{

    public static void Main(string[] args)

    {

         int n;

        Console.WriteLine("กรุณากรอกแม่สูตรคูณ");

        int.TryParse(Console.ReadLine(), out n);

         if (n % 2 == 0) {

            for (int i = 1; i <= 12; i++) {

                Console.WriteLine(n + "x" + i + " = " + (n * i));   

            }

         } else {

            for (int ii = 12; ii >= 1; ii--) {

                Console.WriteLine(n + "x" + ii + " = " + (n * ii)); 

            } 

         }

    }

​

​

}