N = int(input())
X = list(map(int, input().split()))
X.sort()


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]


dp = [0] * (X[-1] + 1)

for i in range(N):
    x = X[i]
    x_div = make_divisors(x)
    tmp = 0
    for xd in x_div:
        tmp = max(tmp, dp[xd])
    dp[x] = tmp + 1

ans = 0
for val in dp:
    ans = max(ans, val)

print(ans)