Update Exercise-53-Preorder_iterative_bst.py

imsanjoykb · web-flow · commit bf3a7f7aec43 · 2020-11-19T21:23:36.000+06:00
diff --git a/Exercise-53-Preorder_iterative_bst.py b/Exercise-53-Preorder_iterative_bst.py
@@ -12,3 +12,5 @@ def preOrderTraversal(root):
         left = current.left
         if left is not None:
             stack.insert(0, left)
+            
+            ##solve
