- Provided file will be valid file , no validation added as a part of solution
- A station id may occur in multiple bus routes, but can never occur twice within the same bus route.
- Service will get the path to file as the first command line argument, example in my solution case :
./gradlw clean bootrun -Droutes-file-path="data/example"
A cache data structure Map <Integer,List< Integer >> where Key is station Id and value is list of route in which station exist
- Construction of such map will be little expensive operation, but as per problem statement its once a week activity
- Response to query will be fast , in terms of time complexity
O(1) - search first station
O(1) - search second station
O(mLogm + nLogn) - Calculating disjoint of route
