N = int(input())
x =  list(map(int,input().split()))
M = max(x) + 1
dp = [0] * M
for i in x:
	dp[i] = 1
for i in range(M):
	if dp[i] == 0:
		continue
	for j in range(i + i,M,i):
		if dp[j] == 0:
			continue
		dp[j] = max(dp[j],dp[i] + 1)
print (max(dp))