UVA11974 Switch The Lights

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3125 [PDF](https://uva.onlinejudge.org/external/119/p11974.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11974/b9a102bf34bbddcd76b016cbf8046008c0b1abcc.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11974/c5c5cc32834e00631146369b37fd9d5f93532c50.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11974/ffb63cc8f15c53991b2059d8291977db27c03212.png)