104. Maximum Depth of Binary Tree (二叉树最大深度)

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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;else{    int l = maxDepth(root.left);    int r = maxDepth(root.right);return l>r?l+1:r+1;}    }}


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