UVA12469 Stones

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=279&page=show_problem&problem=3913 [PDF](https://uva.onlinejudge.org/external/124/p12469.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12469/865c2d4418893a5667eda6fb9120e149a62ae8e8.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12469/da79913a271f5fd2f873623bb6e4d2fedae92da6.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12469/23d20df43a5a5029b12847e3f0f01e7fcf910d8a.png)