import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N,*A = map(int,read().split())

INF = 100
U = 3 * 10 ** 5 + 10
length = [0] * U

div = [[] for _ in range(U)]
for n in range(1,U//2):
    for m in range(n+n,U,n):
        div[m].append(n)

for x in A:
    length[x] = max((length[d] for d in div[x]), default=0) + 1

answer = max(length)
print(answer)