二叉树的深度
题目:
解题思路:
后序遍历(递归法)
https://leetcode-cn.com/problems/er-cha-shu-de-shen-du-lcof/solution/mian-shi-ti-55-i-er-cha-shu-de-shen-du-xian-xu-bia/
代码:
class Solution {
public int maxDepth(TreeNode root) {
if(root == null) return 0;
return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
}
}