UVA12608 Garbage Collection

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=602&page=show_problem&problem=4286 [PDF](https://uva.onlinejudge.org/external/126/p12608.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12608/20f04a0422c5734719504da916cb430249fbde14.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12608/b2d686fd0964f0893d60c612384c4f3a3427d0a5.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12608/6ca51691d058dcffa9f9617d5af98ac95d7ff416.png)