素数环
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Description
输入正整数 n,把整数 1,2,…,n 组成一个环,使得相邻两个整数之和均为素数。请输出所有可能的摆放形式。
输入
一个整数 n(2≤n≤10)
输出
按从小到大的顺序输出所有的素数环的解,最后一行,输出解的总数。
Samples
4
1:1 2 3 4
2:1 4 3 2
3:2 1 4 3
4:2 3 4 1
5:3 2 1 4
6:3 4 1 2
7:4 1 2 3
8:4 3 2 1
total:8
Limitation
1s, 1024KiB for each test case.
3.22
- Status
- Done
- Rule
- ACM/ICPC
- Problem
- 7
- Start at
- 2025-3-22 14:00
- End at
- 2025-4-12 10:00
- Duration
- 500 hour(s)
- Host
- Partic.
- 4