#! ruby
# yukicoder My Practice
# author: Leonardone @ NEETSDKASU
############################################################
def gs() gets.chomp end
def gi() gets.to_i end
def gss() gets.chomp.split end
def gis() gss.map(&:to_i) end
def nmapf(n,f) n.times.map{ __send__ f } end
def arr2d(h,w,v=0) h.times.map{[v] * w} end
def ngs(n) nmapf n,:gs end
def ngi(n) nmapf n,:gi end
def ngss(n) nmapf n,:gss end
def ngis(n) nmapf n,:gis end
def for2p(hr,wr,&pr) hr.each{|i|wr.each{|j| yield(i,j)}} end
def nsum(n) n * (n + 1) / 2 end
############################################################


N = gi
f = (0..N).to_a

K = gi
K.times do
    x, y = gis
    f[x], f[y] = f[y], f[x]
end

A = gis

(1..N).each do |i|
    f[i] = A[f[i] - 1]
end

ans = []
(1..N).each do |i|
    next if f[i] == i
    j = f.index(i)
    while j > i
        ans << "%d %d" % [j - 1, j]
        f[j - 1], f[j] = f[j], f[j - 1]
        j -= 1
    end
end

puts ans.size
puts ans * "\n"