hermi-114/BCP_2E_VRPD_2 ? reverse-engineered prompt

Build me a small Java program that reads a VRP style input file, then creates and checks delivery routes with drones assigned to each vehicle.

I want to be able to set the input file name in the main file, optionally set an output file name, choose how many customers to include in the dataset, and set how many drones can be used per vehicle. The app should load the data, build possible route and drone schedules, evaluate them, and keep the best solutions it finds.

Please make it easy to run from the main entry point, and if anything about the input format is unclear, infer it from the code and README or look up the current docs online if needed. I’d also like the program to print useful progress and final results, and save output when a file name is provided.