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2016-10-11
21:18:45
HDU 1016
A ring is compose of n circles as shown in diagram.
Put natural number 1, 2, ..., n into each circle separately,
and the sum of numbers in two adjacent circles should be a prime.
Note: the number of first circle should always be 1.
input:
n (0 < n < 20).
output:
The output format is shown as sample below.
Each row represents a series of circle numbers in the ring beginning from 1 clockwisely and anticlockwisely.
The order of numbers must satisfy the above requirements.
Print solutions in lexicographical order.
You are to write a program that completes above process.
Print a blank line after each case.
sample input:
6
8
sample output:
Case 1:
1 4 3 2 5 6
1 6 5 2 3 4
Case 2:
1 2 3 8 5 6 7 4
1 2 5 8 3 4 7 6
1 4 7 6 5 8 3 2
1 6 7 4 3 8 5 2
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原文地址：http://www.cnblogs.com/zhou-love-coding/p/5951135.html
