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Grokking the Coding Interview Patterns in C++

Solution: Populating Next Right Pointers in Each Node

Explore how to populate next right pointers in each node of a perfect binary tree using breadth-first search. Understand both a naive queue-based method and an optimized in-place traversal that connects nodes level by level, improving space efficiency without extra data structures. This lesson guides you through implementing and analyzing these approaches to enhance your ability to handle tree-based interview problems.

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Statement

Given 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 contains an additional pointer called next. This pointer is initially set to NULL for all nodes. Your task is to connect all nodes of the same hierarchical level by setting the next pointer to its immediate right node.

The next pointer of the rightmost node at each level is set to NULL.

Constraints:

  • The number of nodes in the tree is in the range
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