def make_divisors(n):
    divisors = []  #必要に応じてsetにしても良いかも
    i = 1
    while i ** 2 <= n:
        if n % i == 0:
            divisors.append(i)
            if i ** 2 != n:
                divisors.append(n//i)
        i += 1
    divisors.sort()
    return divisors

N = int(input())
A = list(map(int,input().split()))
from collections import defaultdict
dic = defaultdict(int)
for a in A:
    tmp = 0
    for x in make_divisors(a)[:-1]:
        if x in dic:
            tmp = max(tmp,dic[x])
    dic[a] = tmp + 1
print(max(dic.values()))