poj 2516 Minimum Cost 【最小费用最大流】【求解K种物品的最小费用,独立求解累加每个结果】
MinimumCostTimeLimit: 4000MS MemoryLimit: 65536KTotalSubmissions: 15010 Accepted: 5154DescriptionDearboy,agoodsvictualer,nowcomestoabigproblem,andheneedsyourhelp.InhissaleareathereareNshopkeepers(mark