LeetCode刷题笔录 Maximum Depth of Binary Tree

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.

递归吧。

public class Solution {
    public int maxDepth(TreeNode root) {
        if(root == null)
            return 0;
        else return 1 + Math.max(maxDepth(root.left), maxDepth(root.right));
    }
}