UVA10022 Delta-wave

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=12&page=show_problem&problem=963 [PDF](https://uva.onlinejudge.org/external/100/p10022.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10022/9f4d1ac4046b608cda7e9cc0b147237a90d1c506.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10022/81c4ce484f874bf971f3a20980287a48fb3e0ce4.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10022/32b66a2209c61022bae6bec07d1aaf6c1ce45111.png)