n = gets.to_i
a = gets.split.map(&:to_i)
gets

def check x
  x.each_cons(3).any? { |a,b,c|
    next true if a < b && b > c && a != c
    next true if a > b && b < c && a != c
    next false
  }
end

ans = []

while check a
  u,v = -1,-1
  while u == v
    u = rand n
    v = rand n
  end
  a[u], a[v] = a[v], a[u]
  ans << [u,v]
end

puts ans.size
ans.each { |a,b|
  puts "#{a} #{b}"
}