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Grokking the Coding Interview Patterns in C++

Solution: Populating Next Right Pointers in Each Node

Explore an optimized breadth-first search method that connects nodes on the same level in a perfect binary tree by populating next right pointers. Learn to traverse levels using tree structure properties for efficient, in-place linking of nodes with O(n) time and O(1) space complexity.

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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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