import sys
from collections import deque, Counter
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 63 - 1
mod = 998244353

n = ii()

a = li()

dp = [-inf] * (n + 1)
dp[0] = 1
maxi = [0] * (max(a) + 1)
div = [set() for _ in range(max(a) + 1)]
for idx, v in enumerate(a):
    v2 = v
    if not div[v]:
        for i in range(1, v2 + 1):
            if i * i > v2:
                continue
            if v2 % i == 0:
                div[v].add(i)
                div[v].add(v2 // i)
    for v2 in div[v]:
        dp[idx] = max(dp[idx], maxi[v2] + 1)
    maxi[v] = dp[idx]

print(max(dp))