#yuki_390

n=int(raw_input())
s=map(int,raw_input().split())
s.sort()
r=[0 for i in xrange(s[-1]+1)]
for i in s:
 r[i]=1
res=1
for i in s:
 for j in xrange(i*2,s[-1]+1,i):
  if r[j]!=0:
   if r[i]>r[j]-1:
    r[j]=r[i]+1
   res=max(res,r[j])
print res