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.
分析：
这道题要求二叉树的最大深度，那么考虑递归实现，求左右分支中较大的那个深度，然后加上1（即root这一层）即可。
/** * Definition for a binary tree node. * function TreeNode(val) { * this.val = val; * this.left = this.right = null; * } */ /** * @param {TreeNode} root * @return {number} */ var maxDepth = function(root) { if(!root) { return 0; } return Math.max(maxDepth(root.left),maxDepth(root.right)) + 1; };
LeetCode 104. Maximum Depth of Binary Tree
原文：http://www.cnblogs.com/gogolee/p/6659526.html