How to Solve Count Complete Tree Nodes Problem
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Count Complete Tree Nodes
Given the root of a complete binary tree, return the number of the nodes in the tree. According to Wikipedia, every level, except possibly the last, is completely filled in a complete binary tree, and...
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Understanding the Count Complete Tree Nodes Problem
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Problem Statement
Given the root of a complete binary tree, return the number of the nodes in the tree. According to Wikipedia, every level, except possibly the last, is completely filled in a complete binary tree, and all nodes in the last level are as far left as possible. It can have between 1 and 2h nodes inclusive at the last level h. Design an algorithm that runs in less than O(n) time complexity.
Count Complete Tree Nodes
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Examples
root = [1,2,3,4,5,6]6root = []0root = [1]1Constraints
The number of nodes in the tree is in the range [0, 5 * 104].0 <= Node.val <= 5 * 104The tree is guaranteed to be complete.How Interview Coder Helps with Leetcode Problems
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