import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    n = int(input())
    *x, = map(int, input().split())
    mx = max(x)
    dp = [0] * (mx + 1)
    c = [0] * (mx + 1)
    for i in x:
        c[i] = 1
    for i in range(1, mx + 1):
        dp[i] += c[i]
        for j in range(2 * i, mx + 1, i):
            dp[j] = max(dp[j], dp[i])
    return max(dp)


if __name__ == '__main__':
    ret = main()
    if ret is not None:
        print(ret)