def Divisors(N):
    divisors=[]
    for i in range(1,N+1):
        if i**2>=N:
            break
        elif N%i==0:
            divisors.append(i)
    if i**2==N:
        divisors+=[i]+[N//i for i in divisors[::-1]]
    else:
        divisors+=[N//i for i in divisors[::-1]]
    return divisors

N=int(input())
A=list(map(int,input().split()))
max_A=max(A)
dp=[-1]*(max_A+1)
dp[0]=0
for a in A:
    for d in Divisors(a)+[0]:
        if a==d:
            continue
        dp[a]=max(dp[a],dp[d]+1)
ans=max(dp)
print(ans)