UVA12831 Bob the Builder

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=861&page=show_problem&problem=4696 [PDF](https://uva.onlinejudge.org/external/128/p12831.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12831/bb6d577d64f16aee1e0ce303a2dedb5e4d12da03.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12831/41c6c0f7ef3d0356d7c990d1260cdcdd5425afb5.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12831/5256f3bbd2514710e97110565d1166e37d7520fc.png)