UVA199 Partial differential equations

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=135 [PDF](https://uva.onlinejudge.org/external/1/p199.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA199/42ffc8205ea589d1ea757c6daed0dcbf812bb008.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA199/e9a0239b9f809e78d6fb3fb382644b19658cb60b.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA199/c98a1597d80e759d7d8ee7f6721d54564943305b.png)