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