Search⌘ K
AI Features
Home
Courses
Learn Data Structures and Algorithms in Go

Problem:Construct Binary Tree from Preorder and Inorder Traversal

Understand how to reconstruct a binary tree from preorder and inorder traversal sequences. Learn to implement a recursive approach with the help of a hashmap for fast lookups, enabling you to build and return the original binary tree structure efficiently.

We'll cover the following...

Statement

You are given two integer arrays, preorder and inorder, representing the preorder traversal and inorder traversal of the same binary tree, respectively. Your task is to reconstruct and return the binary tree from these two traversal sequences.

Note: All values in the tree are unique, and every value present in inorder is also present in preorder.

Constraints:

  • 1≤1 \leq preorder.length ≤3000\leq 3000

  • inorder.length == preorder.length

  • −3000≤-3000 \leq preorder[i], inorder[i] ...