UVA11096 Nails

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=22&page=show_problem&problem=2037 [PDF](https://uva.onlinejudge.org/external/110/p11096.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11096/851fedde04eb01d09a599ddde3e20c8124d9b8b1.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11096/a6c4c49036810ed74a8139d8c499fcac609dc56f.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11096/e04ff17bce1da89492adebcc46503b4f6c6a7a79.png)