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    Supermarket超市(贪心算法 优先队列)- POJ 1456

    A supermarket has a set Prod of products on sale. It earns a profit px for each product x∈Prod sold by a deadline dx that is measured as an integral number of time units starting from the moment the sale begins. Each product takes precisely one unit of time for being sold. A selling schedule is an ordered subset of products Sell ≤ Prod such that the selling of each product x∈Sell, according to the ordering of Sell, completes before the deadline dx or just when dx expires. The profit of the selling schedule is Profit(Sell)=Σx∈Sellpx. An optimal selling schedule is a schedule with a maximum profit. For example, consider the products Prod={a,b,c,d} with (pa,da)=(50,2), (pb,db)=(10,1), (pc,dc)=(20,2), and (pd,dd)=(30,1). The possible selling schedules are listed in table 1. For instance, the schedule Sell={d,a} shows that the selling of product d starts at time 0 and ends at time 1, while the selling of product a starts at time 1 and ends at time 2. Each of these products is sold by its deadline. Sell is the optimal schedule and its profit is 80.

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    OushuDB 小课堂丨迁移(成功)到云端的 7 个步骤

    销售人员承诺,迁移到云将带来更绿的牧场,让我们的口袋里剩下更多的钱。这似乎是可能的,所以我们进行切换并等待。然而,几个月的等待带来了更多相同的结果。它似乎没有使我们的预算受益。这并不是因为迁移到云端不省钱,而是因为在这个过程中需要更多的步骤。 毕竟,购买种子不会自动种植庄稼;创建花园涉及更多。 迁移到云端也不例外。我们不能只是将本地服务器切换到云端然后走开。这是确保成功且有益的云原生转型过程并开始看到这些成果的第一步。但是,一旦完成这些步骤,草地就会随之而来。 高德纳 声称将服务迁移到云为企业平均节省了 15% 的 IT 成本,让我们以更少的预算获得更多的收入。尽管这使得迁移到云非常值得,但节省成本并不是迁移到云的唯一原因,甚至不是主要原因 云原生. 在进入的许多好处之前 云迁移,让我们来看看成功完成云原生转型所需的步骤:

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