# non-specific helper functions
def chunks(n, l):
    for i in range(0, len(l), n):
        yield l[i:i+n]

# specific helper functions
DAYS_PER_MONTH = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ]
def date_to_days(date):
    splitted = date.split('/')
    return sum(DAYS_PER_MONTH[1:int(splitted[0])]) + int(splitted[1])

def read_guests(fpath):
    return map(
        lambda x: ( x[0], date_to_days(x[1]), date_to_days(x[2]) ),
        chunks(3,
            open(fpath).read().split()
        )
    )

# main part
def longest_stay(guests):
    return max(
        map(
            lambda x: ( x[0], 1 + x[2] - x[1] ),
            guests
        ),
        key = lambda x: x[1]
    )

def max_occupancy(guests):
    current_guests = []
    max_current = 0
    for entry in guests:
        current_guests = filter(lambda x: x > entry[1], current_guests) + [ entry[2] ]
        if len(current_guests) > max_current:
            max_current = len(current_guests)
    return max_current

# testing
guests = read_guests("tourists.txt")
print(longest_stay(guests))
print(max_occupancy(guests))