difference_in_array_elements.java

import java.util.*;
public class Program
{
    public static void main(String[] args) 
    {
        Scanner scn=new Scanner(System.in);
       
        int n1=scn.nextInt();
        int [] a1=new int [n1];
        for(int i=0;i<a1.length;i++)
        {
            a1[i]=scn.nextInt();
        }

        int n2=scn.nextInt();
        int [] a2=new int[n2];
        for(int i=0;i<a2.length;i++)
        {
            a2[i]=scn.nextInt();
        }


        int[]diff=new int [n2];
        int c=0;

        int i=a1.length-1;
        int j=a2.length-1;
        int k=diff.length-1;

        while(k>=0)
        {
            int d=0;
            int a1v=i>=0?a1[i]:0;
           
            
            if(a2[j]+c>=a1v)
            {
                d=a2[j]+c-a1v;
                c=0;
            }
            
            else
            {
                 d=a2[j]+c+10-a1v;
                 c=-1;
            }
            
            diff[k]=d;

            i--;
            j--;
            k--;
        }
        int idx=0;
        while(idx<diff.length)
        {
            if (diff[idx]==0)
            {
                idx++;
            }
            else
            {
                break;
            }
        }
        while(idx<diff.length)
        {
            System.out.println(diff[idx]);
            idx++;
        }
    }

}