N=int(input())
X=set(list(map(int,input().split())))
DP=[0]*(10**6+1)
for x in X:
  DP[x]=1
for i in range(10**6+1):
  if DP[i]:
    for j in range(2*i,10**6+1,i):
      if DP[j]:
        DP[j]=max(DP[j],DP[i]+1)
print(max(DP))