a_int = int(input())

timer_data = int(a_int*60/100)

hour_i = 10 + int(int(timer_data/60)%24)
min_i = 0 + int(timer_data%60)
hour_s = ""
min_s = ""

if hour_i < 10:
	hour_s = "0" + str(hour_i)
else:
	hour_s = str(hour_i)


if min_i < 10:
	min_s = "0" + str(min_i)
else:
	min_s = str(min_i)


print(hour_s + ":" + min_s)