Difference in array elements

taking borrow from the next element

difference_in_array_elements.java

@@ -0,0 +1,73 @@
+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++;
+        }
+    }
+
+}