divisors=[[] for i in range(3*10**5+1)]
for i in range(1,3*10**5+1):
    for j in range(1,3*10**5//i+1):
        divisors[i*j].append(i)

import sys

input=sys.stdin.buffer.readline

N=int(input())
A=list(map(int,input().split()))

data=[0]*(max(A)+1)
for i in range(N):
    test=1
    for D in divisors[A[i]]:
        if D!=A[i]:
            test=max(test,data[D]+1)
    data[A[i]]=max(data[A[i]],test)

print(max(data))