from collections import defaultdict

STOP = 3*10**5 + 1
DIVISORS = [[] for i in range(STOP)]
for i in range(1, STOP):
	for j in range(2*i, STOP, i):
		DIVISORS[j].append(i)

N = int(input())
A = list(map(int, input().split()))
dp = defaultdict(int)
for a in A:
	dp[a] = max(dp[a], 1)
	for d in DIVISORS[a]:
		dp[a] = max(dp[a], dp[d] + 1)
K = max(dp.values())
print(K)