from bisect import bisect_left
N = int(input())
A = list(map(int, input().split()))
ans = []
for i in range(N):
    for j in range(i + 1, N):
        if A[i] > A[j]:
            ans.append((i, j))
            A[i], A[j] = A[j], A[i]
#print(A)
print(len(ans), flush=True)
for i in range(len(ans)):
    print(ans[i][0], ans[i][1], flush=True)
Dummy = int(input())