Update clone_binary_tree.py

yingl · web-flow · commit c8bf39c3e317 · 2017-04-25T14:07:35.000+08:00
diff --git a/clone_binary_tree.py b/clone_binary_tree.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# coding: utf-8
 
 class Solution:
     """
@@ -14,4 +14,6 @@ def cloneTree(self, root):
                 new_root.left = self.cloneTree(root.left)
             if root.right:
                 new_root.right = self.cloneTree(root.right)
-        return new_root
+        return new_root
+
+# easy: http://lintcode.com/zh-cn/problem/clone-binary-tree/
