How should I practice Wait Until the Next Bus?

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Wait Until the Next Bus

Capital One● EasyFULLTIMEOA

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Problem statement

You are given a current time and a list of bus departure times for the same service day. Every time is a zero-padded 24-hour string in HH:MM format.

Return the number of minutes until the earliest departure that is at or after the current time. A bus departing exactly now has wait 0. Return -1 if every listed departure has already passed.

Function

nextBusWait(currentTime: String, departures: String[]) → int

Examples

Example 1

currentTime = "09:10"departures = ["08:45","09:30","10:00"]return = 20

The first departure not earlier than 09:10 is 09:30.

Example 2

currentTime = "17:00"departures = ["12:00","17:00","16:30"]return = 0

A departure occurs at the current time.

Constraints

1 <= departures.length <= 10^5.
Every time is a valid same-day HH:MM value.