# 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()))

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

print(max(dp))