Table of ContentsProblem descriptionCheck Completeness of a Binary TreeJavaTime ComplexitySpace ComplexityPythonApproach 1Approach 2 Problem description source: https://leetcode.com/problems/check-completeness-of-a-binary-tree/description/ Check Completeness of a Binary Tree Given the root of a binary tree, determine if it is a complete binary tree. In a complete binary tree, every level, except possibly the last, is completely filled, and all nodes ...