Description
每个城市有1000人,要求把给出的3*K个城市分为3份,每份1000*k人,每个城市投票人数为Wi,使至少两个城市的票数过半(不包括刚好一半)。
Input
* Line 1: 一个数K * Lines 2..3*K+1: 每行一个数Wi
Output
* Lines 1..K: 第一个区域的城市编号
* Lines K+1..2K: 第二个区域的城市编号 * Lines 2K+1..3K: 第三个区域的城市编号
Sample Input
2510
500
500
670
400
310
Sample Output
12
3
6
5
4
OUTPUT DETAILS:
Other solutions might be possible. Note that "2 3" would NOT be a district won by
the Jerseys, as they would be exactly half of the cows.
Hint
本题为SJ,请提交到 http://acm.pku.edu.cn/JudgeOnline/problem?id=2454