1class Currency:
  2    def __init__(self, name, rate):
  3        self.name = name
  4        self.rate = rate
  5
  6    def __eq__(self, other):
  7        if not isinstance(other, Currency):
  8            return False
  9
 10        return self.name == other.name and self.rate == other.rate
 11
 12
 13class PoliticalParty:
 14    def __init__(self, name, motto, members=None, preferred_currency=None):
 15        self.name = name
 16        self._motto = motto
 17        self.members = members if members is not None else []
 18        self.preferred_currency = preferred_currency
 19
 20    @property
 21    def motto(self):
 22        return self._motto
 23
 24    def convert_currency_to_voters(self, amount, currency):
 25        voters = amount // currency.rate
 26
 27        if self.preferred_currency == currency:
 28            voters *= 2
 29
 30        return int(voters)
 31
 32    def __str__(self):
 33        return self.name
 34
 35    def __add__(self, other):
 36        if isinstance(other, PoliticalParty):
 37            return Coalition(self, other)
 38
 39        return NotImplemented
 40
 41
 42class Coalition:
 43    def __init__(self, *parties):
 44        self.parties = []
 45
 46        for party in parties:
 47            self._add_party_if_missing(party)
 48
 49    def _add_party_if_missing(self, party):
 50        for current_party in self.parties:
 51            if current_party.name == party.name:
 52                return
 53
 54        self.parties.append(party)
 55
 56    @property
 57    def members(self):
 58        result = {}
 59
 60        for party in self.parties:
 61            result[party.name] = party.members.copy()
 62
 63        return result
 64
 65    def __str__(self):
 66        names = []
 67
 68        for party in self.parties:
 69            names.append(str(party))
 70
 71        return "-".join(names)
 72
 73    def __add__(self, other):
 74        if isinstance(other, PoliticalParty):
 75            return Coalition(*self.parties, other)
 76
 77        if isinstance(other, Coalition):
 78            return Coalition(*self.parties, *other.parties)
 79
 80        return NotImplemented
 81
 82
 83class Elections:
 84    all_elections = {}
 85
 86    def __init__(self, year):
 87        self.year = year
 88        self.participants = {}
 89        Elections.all_elections[year] = self
 90
 91    def register_party_or_coalition(self, participant):
 92        if participant not in self.participants:
 93            self.participants[participant] = 0
 94
 95    def vote(self, participant):
 96        if participant in self.participants:
 97            self.participants[participant] += 1
 98
 99    def rig_elections(self, participant, amount, currency):
100        if participant not in self.participants:
101            return
102
103        bought_votes = 0
104
105        if isinstance(participant, PoliticalParty):
106            bought_votes = participant.convert_currency_to_voters(amount, currency)
107
108        elif isinstance(participant, Coalition):
109            for party in participant.parties:
110                current_votes = party.convert_currency_to_voters(amount, currency)
111                if current_votes > bought_votes:
112                    bought_votes = current_votes
113
114        self.participants[participant] += bought_votes
115
116    def get_results(self):
117        results = {}
118
119        for participant, votes in self.participants.items():
120            results[str(participant)] = votes
121
122        return results
123
124    @classmethod
125    def get_results_by_year(cls, year):
126        if year not in cls.all_elections:
127            return {}
128
129        return cls.all_elections[year].get_results()