diff --git a/src/my_project/interviews/google_top_exercises/round_1/21_binary_tree_maximum_path_sum.py b/src/my_project/interviews/google_top_exercises/round_1/21_binary_tree_maximum_path_sum.py
index 9afb981c..b343982d 100644
--- a/src/my_project/interviews/google_top_exercises/round_1/21_binary_tree_maximum_path_sum.py
+++ b/src/my_project/interviews/google_top_exercises/round_1/21_binary_tree_maximum_path_sum.py
@@ -6,6 +6,8 @@ def __init__(self, val=0, left=None, right=None):
         self.left = left
         self.right = right
 
+
+
 class Solution:
 
     def __init__(self):
@@ -37,4 +39,5 @@ def dfs(node: Optional[TreeNode]) -> int:
             return node.val + max(left_max, right_max)
         
         dfs(root)
-        return self.max_sum
\ No newline at end of file
+        return self.max_sum
+