from collections import *

class Divisor():
    def __init__(self, N):
        self.L = list(range(N + 1))
        for i in range(2, N + 1):
            if i != self.L[i]:
                continue
            for j in range(2 * i, N + 1, i):
                self.L[j] = i

    def factorize(self, n):
        if n <= 1:
            return []
        D = []
        while n != 1:
            cnt = 0
            now = self.L[n]
            while n % now == 0:
                cnt += 1
                n //= now
            D.append((now, cnt))
        return D

    def div(self, n):
        A = self.factorize(n)
        now = [1]
        for k, v in A:
            M = len(now)
            for i in range(M):
                x = now[i]
                for _ in range(v):
                    x *= k
                    now.append(x)
        return now

N = int(input())
A = list(map(int, input().split()))
D = Divisor(101010)
dp = [-10] * 101010
dp[1] = 0
for a in A:
    for d in sorted(D.div(a), reverse=True):
        dp[a] = max(dp[a], dp[d] + 1) 
        
print(max(dp))