from datetime import datetime, timedelta

# 時刻
base = datetime.strptime('10:00',"%H:%M")
#time_1 = datetime.strptime('05:00:00',"%H:%M:%S")

# 時間
t = timedelta(minutes = int(input())*60/100)

# 時刻 - 時間 を出力
print((base + t).strftime("%H:%M"))