UVA488 Triangle Wave

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=6&page=show_problem&problem=429 [PDF](https://uva.onlinejudge.org/external/4/p488.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA488/44691e782c9561a6adf88c738a77cb8809614fe8.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA488/2261ec6b657481ed72c4158f8d81a9daaea84ee7.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA488/195b52f3642b0639a93dabed1cd5ee1a8a3ff0df.png)