UVA11893 Fabulous DAGy

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=226&page=show_problem&problem=2993 [PDF](https://uva.onlinejudge.org/external/118/p11893.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11893/f606f13b2a016aaabf427bd330241187f497876e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11893/acdc20cd342d65fb71d9570fab50e0975433e41c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11893/51871e2e6bcd97a06076ff6142ab9ec3b108d7a7.png)