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Grokking the Coding Interview Patterns in C++

Solution: Build Binary Tree from Preorder and Inorder Traversal

Understand how to build a binary tree from given preorder and inorder traversal arrays. Discover the recursive approach that identifies root nodes and partitions left and right subtrees using traversal properties, while optimizing search with a hash map for efficient construction.

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Statement

Create a binary tree from two integer arrays, pOrder and iOrder, where pOrder represents a preorder traversal of a binary tree, and iOrder represents an inorder traversal of the same tree.

Constraints:

  • 1≤1 \leq pOrder.length, iOrder.length
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