n = int(input())

arr = map(int,raw_input().split())

arr.sort()

def divisor(n):
	ret = []
	i = 1
	while i ** 2 <= n : 
		if n % i == 0 :
			ret.append(i)
			if i ** 2 != n:
				ret.append(n/i)
		i += 1
	ret.sort()
	ret.reverse()
	return ret

dp = [0]*(10**6+1)

for i in arr:
	for k in divisor(i):
			dp[i] = max(dp[i], dp[k] + 1)
	
print max(dp)