n = int(input())
R = list(map(int, input().split()))

M = [0 for _ in range(n - 1)]
idx = 1
max_n = 1
for i in range(n - 1):
    if R[i] > max_n:
        idx = i + 1
        max_n = R[i]
    M[i] = idx

ans = 1
idx = 0
while R[idx] != n:
    nidx = M[R[idx] - 1] - 1
    idx = nidx
    ans += 1
print(ans)