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回复:谁能用图论来解这道题? 恳请牛人出着。

aisanguo 2010-04-13 15:44:53 ( reads)

your idea would reduce this problem to counting the number of distinct Hamiltonian paths in a undirected graph. Such a problem is generally hard (Hamiltonian path problem is NP-complete).

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jinjing

2010-04-13 18:52:23

You're right.If don't think about first and last Nbs.Erler paths