My answer is correct but the question does not accept it.

Question : CIELAB.

import java.util.*;

public class Main

{

public static void main(String []args)

{

    Scanner sc=new Scanner(System.in);

    long a,b,x,d;

    a=sc.nextInt();
    b=sc.nextInt();
    x=a-b;
    d=x%10;
    x=x/10;
    d=(d+1)%10;
    x=x * 10+d;
    System.out.println(x);
}

}