using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello world");

        Console.WriteLine("choose 1 for Odd or 2 for even numbers");

        int t=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Enter the number you whant to print its series");

        int num=Convert.ToInt32(Console.ReadLine());

        for (int i=0;i<=num;i++)

        {

            if(t==1)

            {

                if (i%2!=0)

                Console.Write(i+" ");

            }

            else 

            {

                if (i%2==0)

                Console.Write(i+" ");

            }

        }

​

    }

}