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Grokking the Coding Interview Patterns

Solution: Populating Next Right Pointers in Each Node

Explore how to connect each node to its immediate right neighbor in a perfect binary tree. Understand efficient breadth-first search techniques to update next pointers with O(n) time complexity and O(1) extra space, enabling you to solve this common tree traversal problem effectively.

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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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