![](https://cdn.luogu.com.cn/upload/pic/6889.png)
by wutiruo @ 2017-08-09 13:13:08
```cpp
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
![](https://cdn.luogu.com.cn/upload/pic/6889.png)
```
by wutiruo @ 2017-08-09 13:13:43
您可以在洛谷ide上试一试
其他人有通过,不予改数据
tag:---
by icy @ 2017-08-09 14:35:17