seconds = step[2] + current[2]
min_borrow = 0
hours_borrow = 0
if seconds < 60:
current[2] = seconds
else:
current[2] = seconds - 60
min_borrow = 1
minutes = step[1] + current[1] + min_borrow
if minutes < 60:
current[1] = minutes
else:
current[1] = minutes - 60
hours_borrow = 1
hours = step[0] + current[0] + hours_borrow
if hours < 24:
current[0] = hours
else:
current[0] = hours -24