UVA11784 Escape

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2884 [PDF](https://uva.onlinejudge.org/external/117/p11784.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11784/f458f7fbbb953bb68d2248dd946111cc6f639beb.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11784/154c780ef46e81b19c938cdcba29ea6082a67b1b.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11784/fbcdade9876359972d13336f648a81d762fcc7ca.png)