UVA11144 S.O.S.

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=23&page=show_problem&problem=2085 [PDF](https://uva.onlinejudge.org/external/111/p11144.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11144/8c80dc135e2781a6b5cc51506c1d7cbd3e6af451.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11144/fd705424189c8c368f65ce18f8be2a92f6edc0e2.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11144/5720e69ce496965f4418ac4619042146eb65a218.png)