def get_time_slot(hour, minute):
	"""
	Computes time_slot id for given hour and minute. Time slot is corresponding to 15 minutes time
	slots in reservation table on Sutka pool web page (https://www.sutka.eu/en/obsazenost-bazenu).
	time_slot = 0 is time from 6:00 to 6:15, time_slot = 59 is time from 20:45 to 21:00.
	:param hour: hour of the day in 24 hour format
	:param minute: minute of the hour
	:return: time slot for line usage
	"""
	slot_id = (hour - 6)*4 + int(minute/15)
	return slot_id