import java.util.Scanner;
public class Armstrong
{
    public static void main(String[]args)
    {
        Scanner keyboard = new Scanner(System.in);
        String inputString = keyboard.nextLine();
        char[] digits = inputString.toCharArray();

        int stringLength = digits.length;
        int sum = 0;

        for(int i = 0;i < stringLength;i++)
        {
           sum += Math.pow(Integer.parseInt(inputString.substring(i, i + 1)), stringLength);
        }

        if(inputString.equals(String.valueOf(sum)))
        {
            System.out.println("It is an Armstrong number");
        }
        else
        {
            System.out.println("It is not an Armstrong number");
        }
    }

}