UVA12258 Air Pollution Problem

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=244&page=show_problem&problem=3410 [PDF](https://uva.onlinejudge.org/external/122/p12258.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12258/52a102608682abeeee741b174102039c9dbf51c5.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12258/e79351b99a2352da4f5cc9c57b285105c52074cb.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12258/fa65b68ba9af124e916e83da0db909bb93cf6969.png)