UVA10205 Stack 'em Up

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1146 [PDF](https://uva.onlinejudge.org/external/102/p10205.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10205/c97f2c6e208f850be9cf293ea1a4a70324df0f92.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10205/d3f1be225de0fcc8d9cb3d882a905ab1075ee995.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10205/87bb104339738ce48953e35c301c984af5c6010e.png)