import sys
N = int(input())
A = [int(i) for i in input().split()]
sys.stdout.flush()
def isKadomatsu(a):
	for i in range(1,len(a) - 1):
		if a[i - 1] < a[i] > a[i + 1] or a[i - 1] > a[i] < a[i + 1]:
			return True
	return False
ans = []
while isKadomatsu(A):
	i = 1
	while i < len(A):
		if A[i - 1] > A[i]:
			ans.append((i - 1,i))
			A[i - 1],A[i] = A[i],A[i - 1]
		i += 1
print(len(ans))
for i in ans:
	u,v = i
	print(u,v)
sys.stdout.flush()