UVA161 Traffic Lights

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=97 [PDF](https://uva.onlinejudge.org/external/1/p161.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA161/671da659f6e68aba046eea4a8d9e92b321f836ab.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA161/d7e6cd20f7b828f086bf524e28e0525d2b9608fd.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA161/7588d94ea78c8e2926a07263def2fd15cfa74acf.png)