HDU 1619 & UVA 116 Unidirectional TSP(树形dp,入门 , 数塔变形)
UnidirectionalTSPDescriptionBackgroundProblemsthatrequireminimumpathsthroughsomedomainappearinmanydifferentareasofcomputerscience.Forexample,oneoftheconstraintsinVLSIroutingproblemsisminimizingwirelen