Given two integer arrays preorder and inorder where preorder is the preorder traversal of a binary tree and inorder is the inorder traversal of the same tree, construct and return the binary tree.
Example 1:
- Input: preorder = [3,9,20,15,7], inorder = [9,3,15,20,7]
- Output: [3,9,20,null,null,15,7]
Example 2:
- Input: preorder = [-1], inorder = [-1]
- Output: [-1]
Constraints:
- 1 <= preorder.length <= 3000
- inorder.length == preorder.length
- -3000 <= preorder[i], inorder[i] <= 3000
- preorder and inorder consist of unique values.
- Each value of inorder also appears in preorder.
- preorder is guaranteed to be the preorder traversal of the tree.
- inorder is guaranteed to be the inorder traversal of the tree.