UVA11921 Save the Princess

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3072 [PDF](https://uva.onlinejudge.org/external/119/p11921.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11921/e3cc710e825af595dd456c523560f4e639a063bd.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11921/274415f5faaa7edb4b2ae1514ff8bd83682902b2.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11921/a5445c15af9d5caac65bda61f26d9e2ede4c50b5.png)