from collections import defaultdict

N = int(input())
S = list(map(int, input().split()))
S.sort()
s = set(S)
d = defaultdict(int)
if N == 1:
    print(1)
    exit()

for ss in S:
    d[ss] = 1

def yaku(X):
    res = 1
    for i in range(1, X+1):
        if i*i > X:
            break
        if X%i == 0:
            if i in s:
                res = max(res, d[i]+1)
            if i*i != X and X//i in s and X//i != X:
                res = max(res, d[X//i]+1)
    d[X] = res
    return res

ans = 0
for i in range(1, N):
    ans = max(ans, yaku(S[i]))
print(ans)