Easy
Quiz
#145 Binary Tree Postorder Traversal
APPROACH
Given the root of a binary tree, return its node values collected in postorder (left subtree, then right subtree, then root).
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What is the optimal approach for this problem?
#145 Binary Tree Postorder Traversal
APPROACH
Given the root of a binary tree, return its node values collected in postorder (left subtree, then right subtree, then root).
What is the optimal approach for this problem?