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Update and rename preorder_transversal.py to bt_preorder_transversal.py

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marina 2023-08-03 13:18:57 -07:00 committed by GitHub
parent 7520042ef9
commit 84b35ceaf3
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1 changed files with 2 additions and 3 deletions
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trees/preorder_transversal.py → trees/bt_preorder_transversal.py
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@ -2,9 +2,8 @@
# -*- coding: utf-8 -*-
# author: bt3gl
# recursive and iterative inorder traversal
def preorder_recursive(root: Optional[TreeNode]) -> list[int]:
def preorder_recursive(root: Optional[Node]) -> list[int]:
if root == None:
return []
@ -12,7 +11,7 @@ def preorder_recursive(root: Optional[TreeNode]) -> list[int]:
return [root.val] + preorder_recursive(root.left) + preorder_recursive(root.right)
def preorder_iterative(root: Optional[TreeNode]) -> list[int]:
def preorder_iterative(root: Optional[Node]) -> list[int]:
result = []
stack = [root]