UVA11722 Joining with Friend

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2769 [PDF](https://uva.onlinejudge.org/external/117/p11722.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11722/ca9f04cf54605dd5de135fdfc34cacfe5de71169.png)

Input Format

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Output Format

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