UVA177 折纸痕 Paper Folding

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=113 [PDF](https://uva.onlinejudge.org/external/1/p177.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA177/fe2b7100c42ae47b5df5d7ef1b44b39dc9267a57.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA177/5e287a1e6c2d9f2d2316b08a900c3c2dd528b0f4.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA177/6a82eeea06a99921561cb57cee2572607c459ff6.png)