A timetable stores each departure as the number of minutes after midnight. Write clock(minutes) that returns the 24-hour time as a string HH:MM, with both parts zero-padded to two digits.
Examples
Input: minutes = 75
Output: "01:15"
Input: minutes = 1439
Output: "23:59"
Constraints
0 <= minutes <= 1439
Goals
- Convert a minute count into hours and minutes
- Return a zero-padded HH:MM string