Design Parking System

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Intuition

• This is one of those too good to be true problems. Super easy. Literally just COUNT.

Complexity

Runtime

$O(N)$, where N is big + medium + small

Space

$O(1)$, since you only track 3 variables at a time

Code

class ParkingSystem:
    def __init__(self, big: int, medium: int, small: int):
        self.parkinglot = [big, medium, small]
 
    def addCar(self, carType: int) -> bool:
                if self.parkinglot[carType - 1]:
                    self.parkinglot[carType - 1] -= 1
                    return True
                return False

Notes

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References

• Design Parking System