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whatalnk/arc033-b.rb

Created October 10, 2017 16:16
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AtCoder ARC #033 B - メタ構文変数
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arc033-b.rb
require 'set'
na, nb = gets.chomp.split(" ").map(&:to_i)
a = Set.new(gets.chomp.split(" ").map(&:to_i))
b = Set.new(gets.chomp.split(" ").map(&:to_i))
puts (a & b).size.to_f / (a | b).size
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