n = int(input())
a = list(map(int,input().split()))
m = 3 * 10 ** 5 + 5
g = [list() for _ in range(m)]
for i in range(1, m):
    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))