from collections import *

def div(n):
    if n <= 0:
        return []
    S = set()
    i = 1
    while i * i <= n:
        if n % i == 0:
            S.add(i)
            S.add(n // i)
        i += 1
    return sorted(list(S), reverse=True)

N = int(input())
A = list(map(int, input().split()))
dp = [-10] * 101010
dp[1] = 0
for a in A:
    for d in div(a):
        dp[a] = max(dp[a], dp[d] + 1) 
    
print(max(dp))