n,*a = map(int,open(0).read().split())
M = 300005
d = [[] for _ in range(M)]
for i in range(1,M):
    for j in range(i*2,M,i):
        d[j].append(i)
r = [0]*M
for ai in a:
    r[ai] = max(r[di] for di in d[ai])+1 if ai>1 else 1
print(max(r))