from collections import *

def enum_div(M):
    L = [[1] for i in range(M + 1)]
    for i in range(2, M + 1):
        for j in range(i, M + 1, i):
            L[j].append(i)
    return L


N = int(input())
X = list(map(int, input().split()))
X.sort()
L = enum_div(10 ** 6 + 5)
D = defaultdict(int)
for i in range(N):
    val = 0
    for v in L[X[i]]:
        if v not in D:
            continue
        val = max(val, D[v])
    D[X[i]] = val + 1

ans = 0
for k, v in D.items():
    ans = max(ans, v)
print(ans)