UVA13109 Elephants

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=871&page=show_problem&problem=5020 [PDF](https://uva.onlinejudge.org/external/131/p13109.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13109/8c3f6b8ffa72934cd51569f8cc38c2afb9565580.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13109/eb562acc204ecc37f9b00fdf2b3b7e9e0c996c5c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13109/e67a1ad7fb1de1b1741ab4088040f5fb0db662e2.png)