import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def SI(): return sys.stdin.readline()[:-1]

from collections import defaultdict

def div(a):
    res=[]
    for d in range(1,a):
        if d**2==a:
            res+=[d]
            break
        if d**2>a:break
        if a%d==0:res+=[d,a//d]
    return res

def main():
    n=II()
    aa=LI()
    lds=defaultdict(int)
    for a in aa:
        dd=div(a)
        val=0
        for d in dd:
            if d==a:continue
            if lds[d]>val:val=lds[d]
        lds[a]=val+1
    #print(lds)
    print(max(lds.values()))


main()