re-solve "226. Invert Binary Tree"

lancelote · Nov 4, 2024 · bf80ec2 · bf80ec2
1 parent 0014084
commit bf80ec2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/invert_binary_tree.py b/src/invert_binary_tree.py
@@ -3,10 +3,11 @@
 
 class Solution:
     def invertTree(self, root: TreeNode | None) -> TreeNode | None:
-        if not root:
+        if root is None:
             return None
 
         root.left, root.right = root.right, root.left
+
         self.invertTree(root.left)
         self.invertTree(root.right)