A permutation of 1..n {An} is called a Perfect Permutation if the sequence {|Ai − i|} is a permutation of 0..(n − 1).
For example, {3, 2, 4, 1} is a perfect permutation for {2, 0, 1, 3} is a permutation of 0..3.
Given an integer n, your mission is to find a perfect permutation of 1..n.
輸入描述
The input consists of several lines. Each line contains a positive integer n ≤ 1000.
輸出描述
The output contains one line for each line in the input. If no such perfect permutation exists, output a single number 0 otherwise the perfect permutation. If more than one solution exist, you can output anyone.
輸入例子
1
2
4
輸出例子
1
0
3 2 4 1
http://www.cppblog.com/Rich-cw/archive/2009/12/19/103543.aspx
