Monkey Party
Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 131072/65536 K (Java/Others)
Total Submission(s): 1099 Accepted Submission(s): 490
Problem Description
Far away from our world, there is a banana forest. And many lovely monkeys live there. One day, SDH(Song Da Hou), who is the king of banana forest, decides to hold a big party to celebrate Crazy Bananas Day. But the little monkeys don't know each other, so as the king, SDH must do something.
Now there are n monkeys sitting in a circle, and each monkey has a making friends time. Also, each monkey has two neighbor. SDH wants to introduce them to each other, and the rules are:
1.every time, he can only introduce one monkey and one of this monkey's neighbor.
2.if he introduce A and B, then every monkey A already knows will know every monkey B already knows, and the total time for this introducing is the sum of the making friends time of all the monkeys A and B already knows;
3.each little monkey knows himself;
In order to begin the party and eat bananas as soon as possible, SDH want to know the mininal time he needs on introducing.
Input
There is several test cases. In each case, the first line is n(1 ≤ n ≤ 1000), which is the number of monkeys. The next line contains n positive integers(less than 1000), means the making friends time(in order, the first one and the last one are neighbors). The input is end of file.
Output
For each case, you should print a line giving the mininal time SDH needs on introducing.
Sample Input
8
5 2 4 7 6 1 3 9
Sample Output
105
Author
PerfectCai
Source
2010 ACM-ICPC Multi-University Training Contest（7）——Host by HIT
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zhengfeng
【题意】香蕉森林里一群猴子（n<=1000)围成一圈开会，会长给他们互相介绍，每个猴子需要时间a[i]。每次只能介绍相邻的两只猴子x和y认识，同时x所有认识的猴子和y所有认识的猴子也就相互认识了，代价为这两伙猴子认识的时间（a[i]）之和。求这群猴子都互相认识的最短时间。
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