UVA765 References

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=9&page=show_problem&problem=706 [PDF](https://uva.onlinejudge.org/external/7/p765.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA765/d7081bf0fc3c615171025a9537474c482fda7ce3.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA765/72497acbd3715378b54ddb582009dc6020cee21c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA765/6e09f436c1226bb82a42422dec86da05f725d77b.png)