# 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
        continue

    D = make_divisors(a)


    for d in D:
        if d == a:
            continue

        dp[a] = max(dp[a],  dp[d] + 1)

print(max(dp))