import sys
def I(): return int(sys.stdin.readline().rstrip())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))


N = I()
X = LI()
X.sort()

flag = [0]*1000001
for x in X:
    flag[x] = 1

dp = [1]*1000001
for x in X:
    a = dp[x]
    for y in range(2*x,1000001,x):
        if flag[y] == 1:
            dp[y] = max(dp[y],a+1)

print(max(dp))