UVA11028 Sum of Product

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=22&page=show_problem&problem=1969 [PDF](https://uva.onlinejudge.org/external/110/p11028.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11028/7190e8e7b993874e02531730d25f05b5ad611db2.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11028/eec22a6b038174def929508e21913d29d5a4ff39.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11028/9ee765558c07397b34420638db8c02f53603edb8.png)