1. Simple Solution:    Complete Code

Write code for low level design (object oriented design) of a movie ticket booking system like BookMyShow.
System has cinemas located in different cities. Each cinema will have multiple screens, and users can book one or more seats in given movie show.

System should be able to add new cinemas and movie shows in those cinemas.
Users should be able to list all cinema's in their city which are displaying a particular movie.
For a given cinema, users should also be able to list all shows which are displaying a particular movie.
Each character in the document has its own style.

Implement the below methods in Solution class:

init(Helper10 helper)

• - init() is our constructor/initializer
• - helper has methods like, helper.print("") and helper.println("")
      which you can use for printing logs,
      System.out.println logs will not be visible.

addCinema(int cinemaId, int cityId,
int screenCount, int screenRow, int screenColumn)
Add a new cinema inside a city.

• - cinemaId is unique across cities
  - 0<=cinemaId<=1000
  - 0<=cityId<=100
  - each cinema can have multiple screens
      1<=screenCount<=10
  - each cinema screen will have seats arranged in rows and columns
  - 1<=screenRow, screenColumn<=100
  

addShow(int showId, int movieId, int cinemaId,
int screenIndex, long startTime, long endTime)
Add a show for displaying a movie on a
  cinema screen in a given time slot.

• - 0<=showId<=2000
  - 0<=movieId<=20
  - 1<=screenIndex<=10
  

List[String] bookTicket(String ticketId,
int showId, int ticketsCount)
Returns list of seats as "row-column"
e.g. ["0-4", "2-14", "2-0", "11-6"]

• 1<=ticketsCount<=10
• - If there are less than ticketsCount seats in the given show,
    then don't book any seats and return empty list.

boolean cancelTicket(String ticketId)
cancels ticket and makes all seats booked in ticketId
again available for booking.

• - return true if booking with ticketId is cancelled
    and seats are released for booking again
• - return false if booking with ticketId doesn't exist
    or it is already cancelled.

int getFreeSeatsCount(int showId)

• - return number of free seats available for booking in show showId
  - if no show exists with showId or no free seats are available
  then return 0
  

List[Integer] listCinemas(int movieId, int cityId)

• - returns cinemaId's of all cinemas which are
      running shows for given movie in the given city
  - cinemaId's are ordered in ascending order
  

List[Integer] listShows(int movieId, int cinemaId)

• - returns showId's of all shows displaying
      the given movie in given cinema.
  - showId's are ordered in descending order of startTime
      and then showId in ascending order
  

Input Example
Solution obj=new Solution();
obj.init(helper)
obj.addCinema(cinemaId=0,
cityId=1, screenCount=4,
screenRow=5, screenColumn = 10)
obj.addShow(showId= 1, movieId=4,
cinemaId=0, screenIndex=1,
startTime=1710516108725, endTime=1710523308725)
obj.addShow(showId = 2, movieId=11,
cinemaId = 0, screenIndex = 3,
startTime = 1710516108725, endTime = 1710523308725)

obj.listCinemas(movieId = 0, cityId = 1)
returned cinemaId's list: []
obj.listShows(movieId = 4, cinemaId = 0)
returned showId's list [1]
obj.listShows(movieId = 11, cinemaId = 0)
returned showId's list [2]

obj.getFreeSeatsCount(showId = 1) returned 50
obj.bookTicket(ticketId = 'tkt-1', showId = 1, ticketsCount = 4)
returned seat's list: [0-0, 0-1, 0-2, 0-3]
obj.getFreeSeatsCount(showId = 1) returned 46

obj.cancelTicket(ticketId = 'tkt-1') returned true
obj.getFreeSeatsCount(showId = 1) returned 50