using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("ENTER A NUMBER TO CHECK AMSTRONG NO");

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

        int copy=x;

        int count_digit=0;

        while(copy!=0)

        {

            count_digit++;

            copy/=10;

        }

        int sum=0;

        copy=x;

        while(copy!=0)

        {

            sum+=(int)Math.Pow(copy%10,count_digit);

            copy/=10;

        }

        if(sum==x)

        Console.WriteLine("Yes it is !");   

        else

            Console.WriteLine("No it's not");   

    }

}