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Update construct_tree_inorder_preorder.py

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bt3gl 2023-07-30 15:51:57 -07:00 • committed by GitHub
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trees_and_graphs/construct_tree_inorder_preorder.py
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@ -1,3 +1,7 @@
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# author: bt3gl
def build_tree(preorder: list[int], inorder: list[int]) -> Optional[TreeNode]:
def helper(i_left, i_right, index_map):