Help me in solving LPYAS151 problem

help
,
1

My issue

int N=sc.nextInt();
int digit=N;
int num=0;
while(N>0)
{
int r=N%10;
num+=(rrr);
N=N/10;
}
if(num==digit)
{
System.out.println(“Armstrong”);
}
else
{
System.out.println(“Not Armstrong”);
} here for printing whether the number is armstrong or not

My code

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int digit=N;
		int num=0;
		while(N>0)
		{
		 int r=N%10;
		 num+=(r*r*r);
		 N=N/10;
		}
		if(num==digit)
		{
		    System.out.println("Armstrong");
		}
		else
		{
		    System.out.println("Not Armstrong");
		}
	}
}

Learning course: Roadmap to 3*
Problem Link: https://www.codechef.com/learn/course/klu-roadmap-3star/KLURMP300B/problems/LPYAS151