UVA12012 Detection of Extraterrestrial

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=242&page=show_problem&problem=3163 [PDF](https://uva.onlinejudge.org/external/120/p12012.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12012/425c60825667fb89e9b9b19c85e75ac68aa268d5.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12012/b6dea61de42006dc10f5e7152a9081ffce031a76.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12012/644ffc213cc0b45f4b799797e7de595617791c96.png)