n = int(input())
houses = list(map(int, input().split()))
wires = 0

for plaque in range(1, n + 1):
    index = houses.index(plaque)
    sec_index = houses.index(plaque, index + 1)
    distance = sec_index - index
    wires += distance
else:
    del plaque, index, sec_index, distance
    print(wires)