Challenge: Is Tree a Heap?
Let’s check if a tree is also min heap or not.
We'll cover the following
Problem
Given a binary tree, find if it represents a min heap.
Note: A min heap is a complete binary tree where the data stored in the parent node is smaller than the data in both of the child nodes.
Input
A binary tree.
Output
Return true if the tree is a heap, otherwise return false.
Sample input
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