N = int(input())
A = list(map(int, input().split()))
gyaku = {}
for i, a in enumerate(A):
    gyaku[a - 1] = i

check = [True] * N
ans = 0
for i in range(N):
    pos = gyaku[i]
    if check[pos]:
        ans += 1
        if 0 <= pos - 1:
            check[pos - 1] = False
print(ans)