Parking Lot Day

Cars come, cars go — the owner wants ONE number: the fullest the lot ever got. 🅿️

You get the day's events (in / out, starting from an empty lot, always valid). Print the maximum number of cars parked at once.

Example:

Input: events = ["in", "in", "out", "in", "in"] Output: 3

The count climbs 1, 2, 1, 2, 3 — the fullest the lot ever got was 3 cars.