Populating Next Right Pointers in Each Node II Leetcode Solution

In this post, we are going to solve the Populating Next Right Pointers in Each Node II Leetcode Solution problem of Leetcode. This Leetcode problem is done in many programming languages like C++, Java, and Python.

Table of Contents

Problem

Given a binary tree

struct Node {
  int val;
  Node *left;
  Node *right;
  Node *next;
}

Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL.

Initially, all next pointers are set to NULL.

Example 1:

Input: root = [1,2,3,4,5,null,7]
Output: [1,#,2,3,#,4,5,7,#]
Explanation: Given the above binary tree (Figure A), your function should populate each next pointer to point to its next right node, just like in Figure B. The serialized output is in level order as connected by the next pointers, with '#' signifying the end of each level.

Example 2:

Input: root = []
Output: []

Constraints:

The number of nodes in the tree is in the range [0, 6000].
-100 <= Node.val <= 100

Follow-up:

You may only use constant extra space.
The recursive approach is fine. You may assume implicit stack space does not count as extra space for this problem.

Now, let’s see the leetcode solution of Populating Next Right Pointers in Each Node II Leetcode Solution.

Populating Next Right Pointers in Each Node II Leetcode Solution in Python

Populating Next Right Pointers in Each Node II Leetcode Solution in CPP

Populating Next Right Pointers in Each Node II Leetcode Solution in Java

Note: This problem Populating Next Right Pointers in Each Node II is generated by Leetcode but the solution is provided by Chase2learn This tutorial is only for Educational and Learning purpose.