n = int(input())
A = list(map(int, input().split()))
ma = max(A)
dp = [0] * (ma + 1)

for a in A:
    if a == 1:
        dp[a] = 1
    else:
        dp[a] = max(dp[a], dp[1] + 1)
    for i in range(2, int(a ** 0.5 + 1)):
        if a % i == 0:
            dp[a] = max(dp[a], dp[i] + 1)
            dp[a] = max(dp[a], dp[a // i] + 1)
print(max(dp))