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]

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

def main():
    n=II()
    aa=LI()
    lds=[0]*300005
    for a in aa:
        val=0
        for d in div(a):
            if lds[d]>val:val=lds[d]
        lds[a]=val+1
    print(max(lds))


main()