UVA572 油田 Oil Deposits

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=7&page=show_problem&problem=513 [PDF](https://uva.onlinejudge.org/external/5/p572.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA572/ce90a5dd1ff852d09612a3d726a859f2f238d409.png)

Input Format

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Output Format

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