import sys

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N, *A = map(int, read().split())

pos = [0] * (N + 1)
for i, x in enumerate(A):
    pos[x] = i

use = [0] * (N + 1)
for x in range(1, N + 1):
    p = pos[x]
    if p == N - 1 or not use[A[p + 1]]:
        use[x] = 1

print(sum(use))