Given an array of strings schedule that represents the schedule of bus departure times and a string time that represents the current time, find out how many minutes ago the last bus left. If the first bus for the day has yet to leave, return -1.

Time is represented as a string in the form of HH:MM (in the 24-hour format). Bus departure times are sorted in chronological order.

Please assume that if a bus is scheduled to leave at the current time, it hasn't left yet.

Note: You are not expected to provide the most optimal solution, but a solution with time complexity not worse than O(schedule.length * MINUTES_IN_DAY) will fit within the execution time limit.

Example

For schedule = ["12:30", "14:00", "19:55"] and time = "14:30", the output should be solution(schedule, time) = 30.

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