UVA481 What Goes Up

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=6&page=show_problem&problem=422 [PDF](https://uva.onlinejudge.org/external/4/p481.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA481/eb73cbb78ceb763a6f8ec05240ffe307eed6035f.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA481/1dbda014dd2ea1d555b2189f194be7fe2432bfde.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA481/9230c15739fc83358be36699c690c574c708717b.png)