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Differential constraint system What is differential constraint system Difference constraint system refers to a method to solve the following multivariate primary inequality system, in which (y1,y2... yn are constants), which is called difference because each inequality of multivariate primary inequality system is about the difference between ...

Search and graph theory (2) This section is about the shortest path. The most common short circuit problems are generally divided into two categories: Single source shortest circuitMulti source sink shortest path In the shortest path problem, the source point is the starting point and the sink point is the end point. Single source shor ...

[SDOI2009]Elaxia's route Title Description Recently, Elaxia and w * * have a very good relationship. They really want to be together all day, but their study in college is too tight. They must reasonably arrange their time together. Elaxia and w * * have to travel between the dormitory and the laboratory every day. They hope to walk together ...