编程介的小学生 2017-08-13 15:32 采纳率: 20.5%
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Perfect Permutation

Description

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.
Input

The input consists of several lines. Each line contains a positive integer n ≤ 1000.
Output

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.
Sample Input

1
2
4
Sample Output

1
0
3 2 4 1

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  • threenewbee 2017-08-27 15:15
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