N = int(input())
A = list(map(int, input().split()))

pos = [0] * (N + 1)

for i in range(N):
    pos[A[i]] = i + 1

res = []
used = [0] * (N + 1)

for i in range(1, N + 1):
    if not used[pos[i]]:
        res.append(i)
        used[pos[i] - 1] = 1

print(len(res))