Instances data

The file contains three subfiles, each containing a category of instances. Each category contains 10, 15, 20 demand points.no.1 contains 20 warehouses, 50 production centers, 50 logistics centers, 2 customs offices. no.2 contains 20 warehouses, 35 production centers, 35 logistics centers, 2 customs offices. no.3 contains 20 warehouses, 20 production centers, 20 logistics centers, 2 customs offices.For example, an instance named "pd10_data(2)" in file "Instance Data no.3" means that in this instance, there are 20 warehouses, 20 production centers, 20 logistics centers, 2 customs offices and 10 demand points.