UVA11816 HST

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=226&page=show_problem&problem=2916 [PDF](https://uva.onlinejudge.org/external/118/p11816.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11816/7f7e50335b667efe6c751c906bb6d5765b516c5e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11816/b747e9c68011192ca86ad272dd0ff897c31d160f.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11816/e5c235dfedb4e6ffd20f40d7cf183ac734e82ed7.png)