Place the Guards

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=12&page=show_problem&problem=1035 [PDF](https://uva.onlinejudge.org/external/100/p10094.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10094/038c45c61433b6ca0f8946d37f5cfeed505897e5.png)

输入输出格式

输入格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10094/2b497d8b68a1220e7f31e447acf0689851a72824.png)

输出格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10094/23ec6c83dcd0404ca0c6ba7d8b698ef5872efa5c.png)

输入输出样例

输入样例 #1

4
8
10

输出样例 #1

2 4 1 3
4 6 8 2 7 1 3 5
2 4 6 8 10 1 3 5 7 9