UVA10144 Expression

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=13&page=show_problem&problem=1085 [PDF](https://uva.onlinejudge.org/external/101/p10144.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10144/b05f0bccbf7ef90305c47d2da975fa023406a791.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10144/31119e9c412ea7cf519e711a2a930fb9703e9829.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10144/d64fb43b2d86d412445f1b89d7740cb5431ac962.png)