CF1205A.Almost Equal

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题目描述

You are given integer nn. You have to arrange numbers from 11 to 2n2n, using each of them exactly once, on the circle, so that the following condition would be satisfied:

For every nn consecutive numbers on the circle write their sum on the blackboard. Then any two of written on the blackboard 2n2n numbers differ not more than by 11.

For example, choose n=3n = 3. On the left you can see an example of a valid arrangement: 1+4+5=101 + 4 + 5 = 10, 4+5+2=114 + 5 + 2 = 11, 5+2+3=105 + 2 + 3 = 10, 2+3+6=112 + 3 + 6 = 11, 3+6+1=103 + 6 + 1 = 10, 6+1+4=116 + 1 + 4 = 11, any two numbers differ by at most 11. On the right you can see an invalid arrangement: for example, 5+1+6=125 + 1 + 6 = 12, and 3+2+4=93 + 2 + 4 = 9, 99 and 1212 differ more than by 11.

给你一个整数 nn。你需要将 11 到 2n2n 的每个整数恰好使用一次,排布在一个圆圈上,使得以下条件成立:

对圆圈上任意连续的 nn 个数,计算它们的和,并将该和写在黑板上。那么黑板上所写的 2n2n 个数中,任意两个数之差的绝对值不超过 11。

例如,取 n=3n = 3。左侧图展示了一个合法的排列:1+4+5=101 + 4 + 5 = 10,4+5+2=114 + 5 + 2 = 11,5+2+3=105 + 2 + 3 = 10,2+3+6=112 + 3 + 6 = 11,3+6+1=103 + 6 + 1 = 10,6+1+4=116 + 1 + 4 = 11,所有黑板上的数两两之差均不超过 11。右侧图展示了一个非法的排列:例如,5+1+6=125 + 1 + 6 = 12,而 3+2+4=93 + 2 + 4 = 9,99 与 1212 的差超过了 11。

输入格式

The first and the only line contain one integer nn (1≤n≤1051 \le n \le 10^5).

第一行且唯一一行包含一个整数 nn(1≤n≤1051 \le n \le 10^5)。

输出格式

If there is no solution, output "NO" in the first line.

If there is a solution, output "YES" in the first line. In the second line output 2n2n numbers — numbers from 11 to 2n2n in the order they will stay in the circle. Each number should appear only once. If there are several solutions, you can output any of them.

如果无解,在第一行输出“NO”。

如果有解,在第一行输出“YES”。在第二行输出 2n2n 个数——即从 11 到 2n2n 的数,按它们在圆圈中的排列顺序输出。每个数恰好出现一次。若存在多个解,输出任意一个即可。

输入输出样例

  • 输入#1

    3

    输出#1

    YES
    1 4 5 2 3 6
  • 输入#2

    4

    输出#2

    NO

说明/提示

Example from the statement is shown for the first example.

It can be proved that there is no solution in the second example.

题目陈述中的示例对应第一个样例。

可以证明第二个样例无解。

输入解题思路,AI测评打分。不知道怎么写?

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