MS
Size: a a a
MS
MS
MS
KO
MS
AD
SI
MS
MS
PT
PT
PT
PT
АИ
KO
A
class Train
@@trains = {}
attr_reader :number
def initialize(number)
@number = number
@@trains[number] ||= []
@@trains[number]>>self
end
def self.find(number)
@@trains[number]
end
end
ЭК
SI