def extract_new(arr)
  dic = {}
  arr.each do |i|
    if dic[i].nil?
      dic[i] = 0
    else
      dic[i] += 1
    end
  end

  new = []
  dic.each { |k, v| new << {key: k, value: v} }
  new = new.select { |d| d[:value] == 0}.map {|d| d[:key]}
  new.size
end


n = gets.to_i
data = gets.split.map(&:to_i)
puts extract_new(data)