03. Plant Discovery

number_of_plants = int(input())
plants = {}

for _ in range(number_of_plants):
    plant, rarity = input().split('<->')
    plants[plant] = {'rarity': int(rarity), 'rating': []}

command = input()
while not command == 'Exhibition':
    command = command.split(': ')
    if command[0] == 'Rate':
        plant, rating = command[1].split(' - ')
        if plant in plants:
            plants[plant]['rating'].append(int(rating))
        else:
            print('error')
    elif command[0] == 'Update':
        plant, rarity = command[1].split(' - ')
        if plant in plants:
            plants[plant]['rarity'] = int(rarity)
        else:
            print('error')
    elif command[0] == 'Reset':
        plant = command[1]
        if plant in plants:
            plants[plant]['rating'] = []
        else:
            print('error')

    command = input()

for plant, value in plants.items():
    if not value['rating']:
        plants[plant]['rating'] = 0
    else:
        plants[plant]['rating'] = sum(plants[plant]['rating'])/len((plants[plant]['rating']))

print('Plants for the exhibition:')
for plant, value in sorted(plants.items(), key=lambda kvp: (-kvp[1]['rarity'], -kvp[1]['rating'])):
    print(f"- {plant}; Rarity: {value['rarity']}; Rating: {value['rating']:.2f}")