You are in charge of a super car factory which is making very popular cars. Recently the factory is developing rappidly; the production lines become more complex and everything is becoming a mess. Your mission is to manage those production lines. Let specific material reaches specific machines, and to produce the parts we need. You must build a certain number of cars in a limited time. Each time you complete the task, the factory becomes larger, production lines become more complex. So use your excellent skill to accomplish the mission. Good luck!