class Xxx
  attr_accessor :answer

  def initialize
  end

  def set_inputs
    @n = gets.chomp.to_i
    @block_lens = gets.chomp.split(" ").map{|n| n.to_i}
  end

  def execute
    @sorting = []
    @prev = nil
    @block_lens.each do |n|
      if @prev.nil?
        @prev = n
        next
      end

      if @prev > n
        @sorting << n
      else
        @prev = n
      end
    end
    @answer = @sorting.size
  end
end

if $0 == __FILE__
  ins = Xxx.new
  ins.set_inputs
  ins.execute
  puts ins.answer
end