Parking lot example only parks cars

[nakshay]

I am no sure if this is expected or not but the parking lot solution always accepts only CARs to be parked as the parking lot class has a default type as CAR, hence truk and bike is never parked and hence after bike is unparked there is no change in the output before and after.

possible solutions:

1. Assigned fixed number of parking for different kind of vehicles on each level.
2. Assign random type of vehicles for parking lot on each level
3. Have some ratios

If you agree on one of the solution I can fix and raise the PR.

[nakshay]

Have created a PR for the same, divides slots in ratio of 50:40:10

[ashishps1]

Hey, thanks for creating the PR. I have merged it. Closing this issue now.