n = int(input())
a = list(map(int, input().split()))
dummy = int(input())  # This line is just for handling the dummy input

# Create the target array sorted in decreasing order
target = sorted(a, reverse=True)

current = a.copy()
swaps = []

for i in range(n):
    if current[i] == target[i]:
        continue
    # Find the position j where current[j] is target[i]
    for j in range(i, n):
        if current[j] == target[i]:
            break
    # Perform the swap
    current[i], current[j] = current[j], current[i]
    swaps.append((i, j))

# Output the result
print(len(swaps))
for u, v in swaps:
    print(u, v)