diff --git a/Assignment10/bin/RecursiveExercise.class b/Assignment10/bin/RecursiveExercise.class
index 517ee7f..9dec825 100644
Binary files a/Assignment10/bin/RecursiveExercise.class and b/Assignment10/bin/RecursiveExercise.class differ
diff --git a/Assignment10/src/RecursiveExercise.java b/Assignment10/src/RecursiveExercise.java
index 9ef8d7d..066eea1 100644
--- a/Assignment10/src/RecursiveExercise.java
+++ b/Assignment10/src/RecursiveExercise.java
@@ -61,12 +61,9 @@ public class RecursiveExercise {
 		if(ht==null)return null;
 		if(n==0)return ht;
 		int temp = ht[0];
-		ht = insertLast(temp,MyArrayUtil.tail(ht));
+		ht = reverse(MyArrayUtil.addAsFirst(temp, reverse(MyArrayUtil.tail(ht))));
 		return shift(ht,n-1);
 	}
-	public static int[] insertLast(int val,int[] ia) throws Exception{
-		return reverse(MyArrayUtil.addAsFirst(val, reverse(ia)));
-	}
 	public static void main(String[] args) throws Exception {
 		// test append, when appending empty array with {1,2,3}
 		int[] a = null;