HDU 4597 Play Game(四维记忆化搜索)

做之前问虎哥比赛的时候怎么过掉的，虎哥说秒过。感觉自己好水啊。。。。

四维记忆化搜索。决策的条件是如果你剩下的数越小你得到的数越大。dp[l1][r1][l2][r2]代表当前状态的最优的情况。

dp[l1][r1][l2][r2] = sum-｛四种衍生出来的状态｝;

Play Game

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)
Total Submission(s): 477    Accepted Submission(s): 285

Problem Description

Alice and Bob are playing a game. There are two piles of cards. There are N cards in each pile, and each card has a score. They take turns to pick up the top or bottom card from either pile, and the score of the card will be added to his total score. Alice and Bob are both clever enough, and will pick up cards to get as many scores as possible. Do you know how many scores can Alice get if he picks up first?

 

Input

The first line contains an integer T (T≤100), indicating the number of cases. 
Each case contains 3 lines. The first line is the N (N≤20). The second line contains N integer a _i (1≤a _i≤10000). The third line contains N integer b _i (1≤b _i≤10000).

 

Output

For each case, output an integer, indicating the most score Alice can get.

 

Sample Input

2 1 23 53 3 10 100 20 2 4 3

 

Sample Output

53 105

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