UVA817 数字表达式 According to Bartjens

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=10&page=show_problem&problem=758 [PDF](https://uva.onlinejudge.org/external/8/p817.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA817/b3db392b4125362d324fe476a3fe5c1402f36381.png)

Input Format

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Output Format

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