from collections import *

def div(n):
    if n <= 0:
        return []
    S = set()
    i = 1
    while i * i <= n:
        if n % i == 0:
            S.add(i)
            S.add(n // i)
        i += 1
    return list(S)

N = int(input())
A = list(map(int, input().split()))
pre = defaultdict(lambda : -10)
pre[1] = 0
for a in A:
    dp = defaultdict(lambda : -10)
    for d in div(a):
        dp[a] = max(dp[a], pre[d] + 1)
    for k, v in pre.items():
        dp[k] = max(dp[k], v)
        
    dp, pre = pre, dp

ans = 0
for k, v in pre.items():
    ans = max(ans, v)
    
print(ans)