UVA10242 Fourth Point !!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1183 [PDF](https://uva.onlinejudge.org/external/102/p10242.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10242/03f08ce407a6f7eb0d3006921f614bb847f76917.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10242/f1b0fffce086787e916528b67c35fcbd426e9303.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10242/5e517caed433cbad5b2f64aa8ae8ad1200a83adc.png)