NeetCode #437LC-958MediumTrees
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#437 · #958 · Check Completeness of a Binary Tree(二叉树的完全性检验)

📌 Problem Statement & Constraints

Given the root of a binary tree, determine whether it is a complete binary tree: every level except possibly the last is full, and all nodes on the last level are as far left as possible. Constraints: the number of nodes is in [1, 100].
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