class Calc0191
  def initialize(args)
    args = args.map { |l| l.chomp.split(/\s+/) }
    @n = args.shift.first.to_i
    @cs = args.shift.map(&:to_i)
  end

  def run
    s = @cs.inject(:+) / 10
    @cs.count { |c| c <= s } * 30
  end
end

puts Calc0191.new(STDIN.readlines).run if __FILE__ == $0