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rt……我也想了半天，题意有点琢磨不清了In Reply To:怎么理解是N^D？向大家求教 Posted by:lqp18_31 at 2009-08-07 19:04:58 怎么都觉得像排列组合里的隔板法，那3 10应该是C(2,9)*A(3,3)+C(1,9)*A(3,3)呀…… Followed by:
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