UVA10312 Expression Bracketing

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=15&page=show_problem&problem=1253 [PDF](https://uva.onlinejudge.org/external/103/p10312.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10312/38417becb0aea3e8c03271c044df26f892d56d72.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10312/964accf9eefc32e4f8afc61f21eb7558df4b70c8.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10312/b9379509b93177c30bf802237076f49e58cea5b4.png)