import sys

readline = sys.stdin.readline

ns = lambda: readline().rstrip()
ni = lambda: int(readline().rstrip())
nm = lambda: map(int, readline().split())
nl = lambda: list(map(int, readline().split()))

def solve():
    n = ni()
    a = nl()
    s = set(a)
    m = max(a) + 5
    g = [[1] for _ in range(m)]
    for i in range(2, m):
        if i in s:
            for j in range(i*2, m, i):
                g[j].append(i)
    c = [-1]*m
    c[1] = 0
    for x in a:
        if x == 1:
            c[x] = 1
        else:
            c[x] = max([c[y] for y in g[x]]) + 1
    print(max(c))
    return

solve()