Max Simultaneous Driver In Past 24 Hours

Given a set of delivery drivers' online time intervals, calculate the maximum number of drivers that were simultaneously online at any point during the past 24 hours. Input: A list where each element is a sublist containing two timestamps representing a driver's online start and end time (in the format 'HH:MM'). Output: An integer representing the maximum number of drivers that were simultaneously online during the past 24 hours. Constraints: When start and end times overlap at the same moment, prioritize the end. Example: Input: [ ['08:00', '12:00'], ['09:00', '10:00'], ['11:00', '13:00'], ['12:30', '13:30'] ] Output: 3 Example Input [['08:00', '12:00'], ['09:00', '11:00'], ['11:00', '13:00']]