import datetime


def solve():
    startTime = datetime.datetime(2019, 1, 1, 10, 00, 00, 000000)
    distance = int(input())
    # 所要時間(時)
    reqTimeAllHour = distance / 100
    # 所要時間(分)
    reqTimeAllMin = reqTimeAllHour * 60
    # 所要時間(時分)
    reqHour = reqTimeAllMin // 60
    reqMin = reqTimeAllMin % 60

    ans = startTime + datetime.timedelta(hours=reqHour, minutes=reqMin)
    print(ans.strftime('%H:%M'))


solve()