UVA12316 Sewing Buttons with Grandma

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=278&page=show_problem&problem=3738 [PDF](https://uva.onlinejudge.org/external/123/p12316.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12316/84f5458ad703e42602f76f658dfe0396bcbbd49d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12316/4ab2588188b866eb3be3cddcaf2190894aac9b9e.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12316/24cd1e38f76ada966231fcdd41d4c861f076cb46.png)