UVA172 Calculator Language

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=108 [PDF](https://uva.onlinejudge.org/external/1/p172.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA172/4cccec85a490328d7be6057fb53547e41cea681f.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA172/70ebe53dc9d4a70525ae0a09e5f41be58f44259c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA172/1dfe8aa9a71f64445157786d443a2034b79e1a70.png)