1class Currency:
 2    def __init__(self, name: str, rate: float):
 3        self.name = name
 4        self.rate = rate
 5
 6    def __eq__(self, other):
 7        return isinstance(other, Currency) and self.name == other.name and self.rate == other.rate
 8
 9
10class PoliticalParty:
11    def __init__(self, name: str, motto: str, members: list[str] = None, preferred_currency: Currency = None):
12        self.name = name
13        self.__motto = motto
14
15        # Putting default = [] means its shared across all instances
16        self.members = members or []
17        self.preferred_currency = preferred_currency
18
19    @property
20    def motto(self):
21        return self.__motto
22
23    def convert_currency_to_voters(self, amount: float, currency: Currency):
24        result = int(amount / currency.rate)
25        return result * 2 if self.preferred_currency == currency else result
26
27    def __str__(self):
28        return self.name
29
30    def __add__(self, other: PoliticalParty):
31        return Coalition(self, other)
32
33
34class Coalition:
35    def __init__(self, *political_parties: PoliticalParty):
36        self.political_parties = political_parties
37
38    @property
39    def members(self):
40        return {party.name: party.members or [] for party in self.political_parties}
41
42    def __add__(self, other: Coalition | PoliticalParty):
43        if isinstance(other, PoliticalParty):
44            return Coalition(*self.political_parties, other)
45
46        return Coalition(*self.political_parties, *other.political_parties)
47
48    def __str__(self):
49        return "-".join(party.name for party in self.political_parties)
50
51
52class Elections:
53    __elections = {}
54
55    def __init__(self, year):
56        self.votes = {}
57        self.year = year
58        Elections.__elections[year] = self
59
60    def register_party_or_coalition(self, candidate: PoliticalParty | Coalition):
61        self.votes[str(candidate)] = 0
62
63    def vote(self, candidate: PoliticalParty | Coalition):
64        if str(candidate) in self.votes:
65            self.votes[str(candidate)] += 1
66
67    def rig_elections(self, candidate: PoliticalParty | Coalition, amount: float, currency: Currency):
68        converter = candidate
69
70        if isinstance(candidate, Coalition):
71            converter = candidate.political_parties[0]
72            for party in candidate.political_parties:
73                if party.preferred_currency == currency:
74                    converter = party
75                    break
76
77        self.votes[str(candidate)] += converter.convert_currency_to_voters(amount, currency)
78
79    def get_results(self):
80        return dict(self.votes)
81
82    @classmethod
83    def get_results_by_year(cls, year: int):
84        return cls.__elections[year].get_results()