# 約数のリストを得る
def make_divisors(n):
    divisors = []
    for i in range(1, int(n ** 0.5) + 1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n // i)
    return divisors

N = int(input())
A = list(map(int, input().split()))
Ay = [make_divisors(a) for a in A]

dp = [0] * (max(A)+1)
for a, Y in zip(A, Ay):
    if a == 1:
        dp[a] = 1
    else:
        t = 0
        for y in Y:
            if y == a:
                continue
            t = max(t, dp[y] + 1)
        dp[a] = t

print(max(dp))