---
# System prepended metadata

title: LeetCode

---

LeetCode
===

Question 1:
Date:2020.12.12
![](https://i.imgur.com/MZysL7J.png)

```C++
class Solution {
public:
    int maxDepth(TreeNode* root) {
        if(!root) return 0;
        int left = maxDepth(root->left);
        int right = maxDepth(root->right);
        return (left > right ? left : right)+1;
    }
};
```