UVA10253 Series-Parallel Networks

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1194 [PDF](https://uva.onlinejudge.org/external/102/p10253.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10253/6c35bbe410fc7653ad64fff21e7f2089018fe613.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10253/4b950ba56936e4986c6456cbe6f444c3dfdd8789.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10253/452b46705a8898ca869828e4c30e75b7b7e81e5c.png)