diff --git a/cpp/hello_world/src/ArraySort.cpp b/cpp/hello_world/src/ArraySort.cpp
index 7bdf81c..d17a5bf 100644
--- a/cpp/hello_world/src/ArraySort.cpp
+++ b/cpp/hello_world/src/ArraySort.cpp
@@ -25,7 +25,10 @@ class ArraySort {
     int p = (left + right) / 2;
     int value = array[p];
 
-    while(left < right) {
+// 10
+// 1, 2, 15, 16, 10, 4, 5, 10, 20, 3
+// 1, 2, 3, 10, 5, 4, 10, 16, 20, 15
+    while(left <= right) {
       while (array[left] < value) {
         left++;
       }
diff --git a/javascript/2019/avlTree.js b/javascript/2019/avlTree.js
index 87aacc7..7028fa4 100644
--- a/javascript/2019/avlTree.js
+++ b/javascript/2019/avlTree.js
@@ -48,7 +48,7 @@ class AVLTree {
     node.left = oldChild;
     newRoot.right = node;
     node.updateHeight();
-    newRoot.updateHeight()
+    newRoot.updateHeight();
     return newRoot;
   }
   leftRotation(node) {
@@ -57,7 +57,7 @@ class AVLTree {
     node.right = oldChild;
     newRoot.left = node;
     node.updateHeight();
-    newRoot.updateHeight()
+    newRoot.updateHeight();
     return newRoot;
   }
   balance(root, value) {