def read_data():
    N = int(input())
    Xs = list(map(int, input().split()))
    return N, Xs
    
def solve(N, Xs):
    maxX = max(Xs)
    dp = [0] * (maxX + 1)
    for x in Xs:
        dp[x] = 1
    for i in range(1, maxX + 1):
        di = dp[i]
        if di == 0:
            continue
        for j in range(i * 2, maxX + 1, i):
            if dp[j] and di >= dp[j]:
                dp[j] = di + 1
    return max(dp)

N, Xs = read_data()
print(solve(N, Xs))