n = int(input())
a = list(map(int, input().split()))
dp = [0] * 100010
for i in range(n):
    Max = 0
    d = 0
    while d * d <= a[i]:
        d += 1
        if a[i] % d != 0:
            continue
        if Max < dp[d]:
            Max = dp[d]
        if Max < dp[a[i] // d]:
            Max = dp[a[i] // d]
    dp[a[i]] = Max + 1
print(max(dp))