UVA12138 Chemical Plant

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=243&page=show_problem&problem=3290 [PDF](https://uva.onlinejudge.org/external/121/p12138.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12138/edd2957ece64508453cdc87356c0706033554a0b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12138/5306875d118d700a4d5ae7189e9c3bda056928b6.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12138/9bcdc4562e8e5c3b24e86063387c6b0b310a1d24.png)