Description: There is a state-owned medium-sized enterprises, received a batch of orders for parts to be machined, the staff are very happy, but happy to have found the problem after the original processing of this enterprise to a limited group of machine parts, if only for these processing tasks added a new machine, then both uneconomical and unnecessary, because the processing after completion of these parts may have to idle up these machines, so the bulk purchase will not do, but these orders must also be completed, then so should we do? Would like to ask you to help design a sequence of processing tasks, making the completion of these orders need to use the least number of machines.
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123.cpp
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