Z = 3 * 10**5

P = [[1] for _ in range(Z+1)]
P[1] = [0]

for i in range(2, Z+1):
    for j in range(i+i, Z+1, i):
        P[j].append(i)

X = [0] * (Z+1)

N = int(input())
A = list(map(int, input().split()))
for a in A:
    t = max(X[i] for i in P[a])
    X[a] = max(X[a], t + 1)

print(max(X))