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请问各位大大,这个为什么WA?

Posted by lixs2003 at 2006-10-20 21:54:01 on Problem 3042
就是一个dp吧
dp[i][j][k] 左端到i右端到j 
k=0,1表示当前停在左还是右 
没错吧?

为什么WA?

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