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Objective: The interface aims to consolidate the round-trip ticket cost of passengers.

Description: The source file is a .txt file, train_route_src.txt, consolidated ith trains from a particular

source to destination. There are man! repetitions in the source file "#everse Duplication: eg. $%# --& $$'

and $$' --& $%#(. #emove the reverse duplicates and maintain the target in...