from itertools import *
from bisect import *
from math import *
from collections import *
from heapq import *
from random import *
from decimal import *
import numpy as np
import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def MI1(): return map(int1, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
dij = [(1, 0), (0, 1), (-1, 0), (0, -1)]

def main():
    n=II()
    aa=LI()
    m=max(aa)
    dp=[-1]*(m+1)
    for a in aa:
        dp[a]=1
    for i in range(1,m):
        pre=dp[i]
        if pre==-1:continue
        for j in range(2,m+5):
            if i*j>m:break
            if dp[i*j]==-1:continue
            dp[i*j]=max(dp[i*j],pre+1)
    print(max(dp))

main()