N = int(input())
A = list(map(int, input().split()))
Z = 3 * 10**5

R = [[] for _ in range(Z+1)]
for i in range(1, Z+1):
    for j in range(i+i, Z+1, i):
        R[j].append(i)



X = [0] * (Z+1)

for a in A:
    if a == 1:
        X[1] = 1
    else:
        for r in R[a]:
            X[a] = max(X[a], X[r] + 1)

print(max(X))