UVA11234 Expressions

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=24&page=show_problem&problem=2175 [PDF](https://uva.onlinejudge.org/external/112/p11234.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11234/fe5f1ccf09733863ec1d357c7f4266803ff34da0.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11234/1ee9196144449ec71a94499625d85194afea09aa.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11234/a15a1fc18b6544599b941d619fe7621d5a5e66e5.png)