To find the maximum depth of a binary tree, we can use recursion. First, we need to check if the tree is empty. If not, we need to find the maximum depth of the left and right subtrees. The maximum depth of the tree is the maximum of the left and right subtrees' depths, plus one.

A.I. Evaluation of the Solution

The candidate's solution correctly finds the maximum depth of a binary tree. The solution uses a recursive approach, which is a good approach for this problem. The solution is clear and easy to understand.

Evaluated at: 2022-11-30 14:15:28