public class Armstrong {
    public static void main(String[] args) {
        int n = 153, temp = n, sum = 0;

        while (n > 0) {
            int digit = n % 10;
            sum += digit * digit * digit;
            n /= 10;
        }

        if (sum == temp)
            System.out.println("Armstrong Number");
        else
            System.out.println("Not an Armstrong Number");
    }
}