n,*a = map(int,open(0).read().split())
M = 300005
r,c = [1]*M, [0]*M
for v in a:
    if c[v] < r[v]:
        r[v*2::v] = [max(k,r[v]+1) for k in r[v*2::v]]
        c[v] = r[v]
print(max(c))