UVA418 Molecules

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=6&page=show_problem&problem=359 [PDF](https://uva.onlinejudge.org/external/4/p418.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA418/651795eda092c64102cc321be14d94c6fa513b2b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA418/64357463f048a3147fac9cd4e20bee8565f2be03.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA418/b00c1bfa0766949a8e7e89d902eac1c7c3705b6e.png)