from collections import defaultdict
import sys
readline=sys.stdin.readline

N=int(readline())
X=sorted(list(map(int,readline().split())))
set_X=set(X)
dp=defaultdict(int)
for x in X:
    dp[x]=max(dp[x],1)
    for y in range(2*x,10**6+1,x):
        if y in set_X:
            dp[y]=max(dp[y],dp[x]+1)
ans=max(dp.values())
print(ans)