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

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

dp = [0]*(max(X)+1)
for x in X:
    if x == 1:
        dp[1] = 1
        continue
    d = make_divisors(x)
    for i in d:
        if i == x:
            continue
        dp[x] = max(dp[i]+1, dp[x])
print(max(dp))