dp = [0]*(10**6+1)
N = int(raw_input())
for i in map(int,raw_input().split()):
	dp[i] = 1
for i in xrange(2,10**6):
	if dp[i] == 0:
		continue
	for j in xrange(i*2,10**6+1,i):
		if dp[j] == 0:
			continue
		if dp[i] + 1 > dp[j]:
			dp[j] = dp[i] + 1
print max(dp)+ dp[1]