def main():
    import sys
    input = sys.stdin.readline

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

    div = [[] for _ in range(Amax+1)]
    for i in range(1, Amax+1):
        for j in range(2, Amax // i + 1):
            div[i*j].append(i)

    dp = [0] * (Amax+1)
    for a in A:
        if a == 1:
            dp[a] = 1
            continue
        for d in div[a]:
            dp[a] = max(dp[a], dp[d] + 1)
    print(max(dp))


if __name__ == '__main__':
    main()