from collections import defaultdict



def divisors(n):
    lower_divisors , upper_divisors = [], []
    i = 1
    while i*i <= n:
        if n % i == 0:
            lower_divisors.append(i)
            if i != n // i:
                upper_divisors.append(n//i)
        i += 1
    return lower_divisors + upper_divisors[::-1]

N=int(input())
x=list(map(int,input().split()))
x.sort()
rui=defaultdict(int)
for i in range(N):
  now=divisors(x[i])
  rui[x[i]]=1
  for next in now:
    if x[i]==next:continue
    rui[x[i]]=max(rui[x[i]],rui[next]+1)
print(max(rui.values()))