Connect All Siblings of a Binary Tree

Explore how to efficiently connect all sibling nodes in a perfect binary tree by setting the next pointer of each node to its immediate right sibling. This lesson helps you implement an optimal O(n) time and O(1) space solution and deepen your understanding of breadth-first search techniques in tree traversal.

We'll cover the following...

Statement
Examples
Understand the problem
Figure it out!
Try it yourself

Statement

Given the root of a perfect binary treeA binary tree in which all the levels are completely filled with nodes, and all leaf nodes (nodes with no children) are at the same level., where each node is equipped with an additional pointer, next, connect all nodes from left to right. Do so in such a way that the next pointer of each node points to its immediate right sibling except for the rightmost node, which points to the first node of the next level.

The next pointer of the last node of the binary tree (i.e., the rightmost node of the last level) should be set to NULL.

Constraints: ...