n = int(input())
a = list(map(int, input().split()))
dummy = input()  # read the dummy line

current = a.copy()
swaps = []

for i in range(n):
    # Find the index of the maximum element in current[i..n-1]
    max_idx = i
    max_val = current[i]
    for j in range(i, n):
        if current[j] > max_val:
            max_val = current[j]
            max_idx = j
    if max_idx != i:
        swaps.append((i, max_idx))
        current[i], current[max_idx] = current[max_idx], current[i]

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