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Solution: Build Binary Tree from Preorder and Inorder Traversal

Understand how to build a binary tree from preorder and inorder traversal arrays by applying recursive methods. This lesson guides you through selecting root nodes, dividing subtrees, and using hash maps to optimize search operations, enabling you to implement the solution with O(n) time and space complexity.

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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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