UVA12980 Keypad Problem

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4859 [PDF](https://uva.onlinejudge.org/external/129/p12980.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12980/c9be224cacd672965f29c6cc197912956097774d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12980/825e0e396d5984096c975c56ee253f07c1edaba2.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12980/67b2d01aec881752787042dc5efe0b053c07b37d.png)