Plant discovery

n = int(input())

plants = {}

for i in range(n):
    plant, rarity = input().split('<->')

    if plant not in plants:
        plants[plant] = [[], []]
    plants[plant][0] = int(rarity)

while True:
    current_command = input()

    if current_command == 'Exhibition':
        break

    tokens = current_command.split(': ')
    command = tokens[0]

    if command == 'Rate':
        plant, rating = tokens[1].split(' - ')

        if plant in plants:
            plants[plant][1].append(float(rating))
        else:
            print('error')

    elif command == 'Update':
        plant, new_rarity = tokens[1].split(' - ')

        if plant in plants:
            plants[plant][0] = int(new_rarity)
        else:
            print('error')

    elif command == 'Reset':
        plant = tokens[1]

        if plant in plants:
            plants[plant][1] = []
        else:
            print('error')

    else:
        print('error')

average_ratings = {}

for key, value in plants.items():

    if len(value[1]) == 0:
        average = 0
    else:
        average = sum(value[1]) / len(value[1])
    average_ratings[key] = [value[0], average]

print('Plants for the exhibition:')
sorted_plants = dict(sorted(average_ratings.items(), key=lambda x: (-x[1][0], -x[1][1])))

for key, value in sorted_plants.items():
    print(f'- {key}; Rarity: {value[0]}; Rating: {value[1]:.2f}')