n = gets.to_i
a_list = gets.split.map(&:to_i)
count = a_list.length - a_list.index(n) - 1
a = n - 1
(a_list.index(n) - 1).downto(0) do |i|
  if a_list[i] != a
    count += 1
  else
    a -= 1
  end
end
puts count