UVA333 Recognizing Good ISBNs

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=5&page=show_problem&problem=269 [PDF](https://uva.onlinejudge.org/external/3/p333.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA333/b7d1b4d7f6518c39d6ec7391599ac2f5c2849032.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA333/bd94474707caa7a537717ea3047ec318e2048086.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA333/26671d738ebe361ab88af0444ee8d2017b86ef14.png)