UVA215 电子表格计算器 Spreadsheet Calculator

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=4&page=show_problem&problem=151 [PDF](https://uva.onlinejudge.org/external/2/p215.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA215/8751092292083297b903e80be78e9b0c38df00de.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA215/f1584f4e78ba41857465540b4830890da13b97d4.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA215/7a38070c71d5d86e687e7b9ce2a5c2ebf8aa08fb.png)