【Leetcode】:104. Maximum Depth of Binary Tree 问题 in JAVA

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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.

/** * Definition for a binary tree node. * public class TreeNode { *     int val; *     TreeNode left; *     TreeNode right; *     TreeNode(int x) { val = x; } * } */public class Solution {    public int maxDepth(TreeNode root) {        if (root == null) {            return 0;        }        if (root.left == null && root.right == null) {            return 1;        }         int l = maxDepth(root.left);        int r = maxDepth(root.right);        return l>=r ? l+1 : r+1;    }}


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