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#https://www.facebook.com/lakshay.gulati.5/posts/3439658002768650

# subscribed by Lakshay

import java.util.Scanner;

public class isbn {

public static void main(String[] args) {

System.out.println("enter the 10 digit ISBN");

long store[];

long sum=0;

store = new long[10];

Scanner scan = new Scanner(System.in);

String num= scan.next();

long num1 = Long.parseLong(num);

if(num.length()==10){

for (int i=9;i>=0;i--){

store[i]=(num1%10);

num1=(num1/10);

sum=sum+(store[i]*(i+1));

}

System.out.println(sum);

if ((sum%11)==0) {

System.out.println("Legal ISBN");

}

else{

System.out.println("Illegal ISBN");

}

}

else{

System.out.println("Illegal ISBN");

}

}

}