from collections import defaultdict

# 約数の列挙
def make_divisors(n):
    lower_divisors , upper_divisors = [], []
    i = 1
    while i*i <= n:
        if n % i == 0:
            lower_divisors.append(i)
            if i != n // i:
                upper_divisors.append(n//i)
        i += 1
    return lower_divisors + upper_divisors[::-1]

def main():
    N = int(input())
    X = list(map(int, input().split()))
    X.sort()

    data = defaultdict(int)
    for x in X:
        sub = 0
        for div in make_divisors(x):
            sub = max(sub, data[div] + 1)
        data[x] = sub

    ans = max(data.values())
    print(ans)

if __name__ == "__main__":
    main()