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Update is_tree_symmetric.py

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bt3gl 2023-07-30 15:52:35 -07:00 committed by GitHub
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trees_and_graphs/is_tree_symmetric.py
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@ -1,3 +1,7 @@
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# author: bt3gl
def is_symmetrical(root: Optional[TreeNode]) -> bool:
stack = [(root, root)]