import sys
from collections import defaultdict
sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


N = I()
A = LI()
M = max(A)

div = [[] for _ in range(M+1)]
for i in range(1,M+1):
    for j in range(2*i,M+1,i):
        div[j].append(i)

dp = [0]*(M+1)
for a in A:
    x = 1
    for d in div[a]:
        x = max(x,dp[d]+1)
    dp[a] = x

ans = max(dp)
print(ans)