UVA13111 The price is correct

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=871&page=show_problem&problem=5022 [PDF](https://uva.onlinejudge.org/external/131/p13111.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13111/05ca6a1fa9d30ea593000d0d162ac0c16438f38c.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13111/ef4068223441e90bb7eeda606310ccac7f46e123.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13111/05fe84cff6d1691a9712193269990d71649b0dc6.png)