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

S = [0] * (N - 1)
S[0] = R[0] 
for i in range(1, N - 1):
  S[i] = max(S[i - 1], R[i])
S = [0] + S

t = 1
cnt = 0
while t != N:
  t = S[t]
  cnt += 1

print(cnt)