嘤嘤嘤,实习半年多的小蒟蒻的第一篇博客(题解) 英文的: There is a pile of n wooden sticks. The length and weight of each stick are known in advance. The sticks are to be processed by a woodworking machine in one by one fashion. It needs some time, called setup time, for the m
题目大意:某工厂收到了n个产品的订单,这n个产品分别在A.B两个车间加工,并且必须先在A车间加工后才可以到B车间加工.某个产品i在A.B两车间加工的时间分别为Ai.Bi.怎样安排这n个产品的加工顺序,才能使总的加工时间最短.这里所说的加工时间是指:从开始加工第一个产品到最后所有的产品都已在A.B两车间加工完毕的时间. 题解:可以先考虑只有两个物品的情况,设两个物品的加工时间分别为 \(a_1,b_1,a_2,b_2\),则先加工 A 再加工 B 的总时间为 \(a_1+max(b_1,a_2)+