HDU 4081 Qin Shi Huang's National Road System (次小生成树算法)
转载自http://blog.csdn.net/shuangde800D_Double题目:ProblemDescriptionDuringtheWarringStatesPeriodofancientChina(476BCto221BC),thereweresevenkingdomsinChina—-theywereQi,Chu,Yan,Han,Zhao,WeiandQin.YingZhengw