from sys import stdout
def iskadomatsu(a,b,c):
	return b>a>c or b>c>a or b<a<c or b<c<a
N = int(raw_input())
A = map(int,raw_input().split())
M = 0
op = []
for i in xrange(N-2):
	if iskadomatsu(A[i],A[i+1],A[i+2]):break
else:
	print 0
	stdout.flush()
	input()
	quit()
for i in xrange(N):
	for j in xrange(i+1,N):
		if A[j]<A[j-1]:
			A[j-1],A[j]=A[j],A[j-1]
			M+=1
			op.append([j-1,j])
print M
for u,v in op:
	print u,v
stdout.flush()
input()