Update inorder-successor-in-bst.py

JeremyHide · Sep 22, 2015 · 896a430 · 896a430
1 parent 1fff0ea
commit 896a430
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Python/inorder-successor-in-bst.py b/Python/inorder-successor-in-bst.py
@@ -16,7 +16,7 @@ def inorderSuccessor(self, root, p):
         :rtype: TreeNode
         """
         # If it has right subtree.
-        if p.right:
+        if p and p.right:
             p = p.right
             while p.left:
                 p = p.left