from collections import defaultdict
n=int(input())
x = list(map(int,input().split()))
d = defaultdict(int)
x.sort()
def  cal(a):
    for i in range(1,int(a**0.5)+1):
        if a%i==0:
            if i == a:
                continue
            if d[i] != 0:
                d[a] = max(d[i]+1,d[a])
            t=a//i
            if t == a or d[t] == 0:
                continue
            d[a] = max(d[t] + 1,d[a])
            
for i in range(n):
    now = x[i]
    
    if d[1] > 0:
        d[now] = 2
    else:
        d[now] = 1
        
    cal(now)

print(max(d.values()))