n = int(input())
A = list(map(int, input().split()))
_ = input()  # Dummy input

arr = A.copy()
swaps = []

for i in range(n):
    max_idx = i
    for j in range(i, n):
        if arr[j] > arr[max_idx]:
            max_idx = j
    if max_idx != i:
        swaps.append((i, max_idx))
        arr[i], arr[max_idx] = arr[max_idx], arr[i]

print(len(swaps))
for u, v in swaps:
    print(u, v)