UVA12533 Joining Couples

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=3978 [PDF](https://uva.onlinejudge.org/external/125/p12533.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12533/23fab468deee947bffeb42cf1675520e697122ca.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12533/85bf756596586dc47618e0001c24744955f53abb.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12533/c47374d3776b98b841a4e56f1ecd6253a31f7173.png)