https://github.com/shubhamv108/lld-parking-lot
https://github.com/shubhamv108/lld-parking-lot
Last synced: 8 months ago
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- Host: GitHub
- URL: https://github.com/shubhamv108/lld-parking-lot
- Owner: shubhamv108
- Created: 2021-10-11T20:01:56.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2021-10-11T20:09:27.000Z (about 4 years ago)
- Last Synced: 2025-01-29T22:44:46.754Z (10 months ago)
- Language: Java
- Size: 78.1 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
### Problem Statement:
I own a multi-storey parking lot that can hold up to ‘n’ cars at any given point in time. Each slot is given a number starting at 1 increasing with increasing distance from the entry point in steps of one. I want to create an automated ticketing system that allows my customers to use my parking lot without human intervention.
When a car enters my parking lot, I want to have a ticket issued to the driver. The ticket issuing process includes us documenting the registration number (number plate) and the colour of the car and allocating an available parking slot to the car before actually handing over a ticket to the driver (we assume that our customers are nice enough to always park in the slots allocated to them).
The customer should be allocated a parking slot which is nearest to the entry. At the exit the customer returns the ticket which then marks the slot they were using as being available.
Due to government regulation, the system should provide me with the ability to find out:
● Registration numbers of all cars of a particular colour.
● Slot number in which a car with a given registration number is parked.
● Slot numbers of all slots where a car of a particular colour is parked.
We interact with the system via a simple set of commands which produce a specific output. It should provide us with an interactive command prompt based shell where commands can be typed in.
Example input and output from the terminal (or command prompt):
$ create_parking_lot 6
Created a parking lot with 6 slots
$ park KA-01-HH-1234 White
Allocated slot number: 1
$ park KA-01-HH-9999 White
Allocated slot number: 2
$ park KA-01-BB-0001 BlackAllocated slot number: 3
$ park KA-01-HH-7777 Red
Allocated slot number: 4
$ park KA-01-HH-2701 Blue
Allocated slot number: 5
$ park KA-01-HH-3141 Black
Allocated slot number: 6
$ leave 4
Slot number 4 is free
$ status
Slot No.
1
2
3
5
6
Registration No
KA-01-HH-1234
KA-01-HH-9999
KA-01-BB-0001
KA-01-HH-2701
KA-01-HH-3141
Colour
White
White
Black
Blue
Black
$ park KA-01-P-333 White
Allocated slot number: 4
$ park DL-12-AA-9999 White
Sorry, parking lot is full
$ registration_numbers_for_cars_with_colour White
KA-01-HH-1234, KA-01-HH-9999, KA-01-P-333
$ slot_numbers_for_cars_with_colour White
1, 2, 4
$ slot_number_for_registration_number KA-01-HH-3141
6
$ slot_number_for_registration_number MH-04-AY-1111
Not found
$ exit