UVA10682 Forr

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=18&page=show_problem&problem=1623 [PDF](https://uva.onlinejudge.org/external/106/p10682.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10682/2bdf7dffc7e55fdedbed1bb4a50f02640195d055.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10682/173a76bacd79624a931f62fb71b15c24ffbe51b5.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10682/8ddc8be46cadb45b8240c0b34b8e2eda7e64ec5f.png)