UVA10474 大理石在哪儿 Where is the Marble?

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=16&page=show_problem&problem=1415 [PDF](https://uva.onlinejudge.org/external/104/p10474.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10474/2bb1c26d80e7830dba0391c0afa3b04c198f8ee0.png)

Input Format

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Output Format

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