# 559.Maxmium Depth of N Ary Tree

**559.Maximum Depth of N Ary Tree**

难度:Easy

> 给定一个 N 叉树，找到其最大深度。

最大深度是指从根节点到最远叶子节点的最长路径上的节点总数。

例如，给定一个 3叉树 :

![](https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2018/10/12/narytreeexample.png)

我们应返回其最大深度，3。

说明:

树的深度不会超过 1000。 树的节点总不会超过 5000。

代码如下：

```
/*
// Definition for a Node.
class Node {
public:
    int val;
    vector<Node*> children;

    Node() {}

    Node(int _val, vector<Node*> _children) {
        val = _val;
        children = _children;
    }
};
*/
class Solution {
public:
    int maxDepth(Node* root) {
        if(!root) return 0;
        int res=0;
        for(auto i:root->children)
            res=max(res,maxDepth(i));
        return ++res;
    }
};
```


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