UVA10309 Turn the Lights Off

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=15&page=show_problem&problem=1250 [PDF](https://uva.onlinejudge.org/external/103/p10309.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10309/6a4324d18ed5267b857299f35c4b98abbc798599.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10309/1affcc7b006c1c4aecaafee00ffd70803d20af02.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10309/46401a094b54caac5532a84fecc2efab9972851d.png)