from datetime import datetime, date, timedelta

class Problem0651:
    def solve(this):
        t = datetime.strptime('10:00', '%H:%M')

        a = int(input())
        print(datetime.strftime(t + timedelta(minutes=60 * a / 100), '%H:%M'))

if __name__ == "__main__":
    problem = Problem0651()
    problem.solve()