Meaning of the questions: a-> bc: overcome b Castle before the first capture of a castle overcome b Castle will get c The total n Castle (number-n) up to overcome the m castles can get maximum benefit The root of the tree as a node connected into a tree p [root] [i] i points to get selected in the sub-tree root-root maximum benefit p [root] [i] = max (p [root] [i], p [root] [ij]+ p [v [e]] [j]) When the root! = 0 Meike subtree root Required so p [root] [i] = p [root] [i-1]+ val [root] The result is p [0] [m]

hdu1561树形DP.doc

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