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