N = int(input())
A = list(map(int, input().split()))

D = {}
for a in A:
    if a in D:
        continue
    i = 1
    D[a] = []
    while i * i <= a:
        if a % i == 0:
            D[a].append(i)
            j = a // i
            if i != j:
                D[a].append(j)
        i += 1


dp = [0] * (max(A)+1)
for a in A:
    if a == 1:
        dp[a] = 1
        continue
    for c in D[a]:
        if a == c:
            continue
        dp[a] = max(dp[a], dp[c] + 1)

print(max(dp))