How To Merge Two Binary Trees In JavaScript

How To Merge Two Binary Trees In JavaScript

First we need to make sure the input, the given arguments for our function, that is two binary trees. And the output is a merged tree.

Problem

Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are not.

You need to merge them into a new binary tree. The merge rule is that if two nodes overlap, then sum node values up as the new value of the merged node. Otherwise, the NOT null node will be used as the node of new tree.

Example input:

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