from collections import defaultdict

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 range(1, int(a**0.5)+1):
		if a % d != 0: continue
		if d < a:
			dp[a] = max(dp[a], dp[d] + 1)
		if a//d < a:
			dp[a] = max(dp[a], dp[a//d] + 1)
K = max(dp.values())
print(K)