UVA12461 Airplane

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=279&page=show_problem&problem=3904 [PDF](https://uva.onlinejudge.org/external/124/p12461.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12461/3b42c1071da26da01e4db1fb4e3d0d35c589f88a.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12461/090d8658854b47f35e7cc34b8eb1698d38523ec4.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12461/6acb7f78c3b3e73e36f009db435778ddc0e8bfc5.png)