UVA626 Ecosystem

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8&page=show_problem&problem=567 [PDF](https://uva.onlinejudge.org/external/6/p626.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA626/3231eaa0c75f9268a855e402dab620f2cd253bb9.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA626/c1226d89f46127a5eac7b415a44f07a4e96703ad.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA626/f5a689df8de410541e8e0389b109655a712459ed.png)