n = int(input())
R = [0]+list(map(int,input().split()))+[n]

ans = 0
now = 1

while now < n:
    m = 0
    nex = R[now]

    nind = 0
    for i in range(now,nex+1):
        if m <= R[i]:
            m = R[i]
            nind = i
    ans += 1
    now = nind
print(ans)