JAVA Help

import java.util.*;
class SpecialNo
{
    public static void main()
    {
        Scanner s=new Scanner(System.in);
        int n,dup,pro,sum=0,i,a;
        System.out.println("Enter a no.");
        n=s.nextInt();
        dup=n;
        while(dup>0)
        {
            pro=1;
            a=dup%10;
            for (i=1;i<=a;i++)
            pro=pro*i;
            sum=sum+pro;
            dup=dup/10;
        }
        if(sum==n)
        System.out.println(n+" is a special no.");
        else
        System.out.println(n+" is not a special no.");        
    }
}