【Leetcode】Maximum Depth of Binary Tree

题目链接：https://leetcode.com/problems/maximum-depth-of-binary-tree/

题目：

Given a binary tree, find its maximum depth.

The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node.

思路：

递归左右子树高度

算法：

public int maxDepth(TreeNode root) {if (root == null)return 0;int h1 = maxDepth(root.left);int h2 = maxDepth(root.right);return h1 > h2 ? h1 + 1 : h2 + 1;}