import collections
def make_divisors(n):
    lower_divisors , upper_divisors = [], []
    i = 1
    while i*i <= n:
        if n % i == 0:
            lower_divisors.append(i)
            if i != n // i:
                upper_divisors.append(n//i)
        i += 1
    return lower_divisors + upper_divisors[::-1]
N = int(input())
A = list(map(int, input().split())) 
D = collections.defaultdict(int)
for a in A:
    DIV = make_divisors(a)
    v = 0
    for div in DIV:
        v = max(v,D[div]+1)
    D[a]=v

print(max(D.values()))