UVA12928 Death Star

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4807 [PDF](https://uva.onlinejudge.org/external/129/p12928.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12928/63a1261713b1c57d836a987b3401dd0d0ee4c229.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12928/1e57a2966fbe078ff1571a6177ae396e0a1bd364.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12928/19380643863e0c9ff0f5b85938b139689a52fe29.png)