n=int(input())
a=list(map(int,input().split()))
L=max(a)
o=[0]*(L+1)
for v in a:
  o[v]=1
q=[0]*(L+1)
for i in range(1,L+1):
  q[i]+=o[i]
  for j in range(i+i,L+1,i):
    q[j]=max(q[j],q[i])
print(max(q[i] for i in range(L+1) if o[i]))