using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter ur no:");

        int n =int.Parse(Console.ReadLine()) ;

        int a=0;

        for(int i=2;i<=n;i++) 

        {

            if(n%i==0) 

            {

                a++;

                break;

            }

        }

        if (a==0) 

        {

            Console. WriteLine ("it is prime no") ;

        }

        else

        {

            Console. WriteLine ("it is not prime ") ;

        }

    }

}