/* -*- coding: utf-8 -*-
 *
 * 979.cc:  No.979 Longest Divisor Sequence - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 300000;
const int MAX_A = 300000;

/* typedef */

/* global variables */

int dp[MAX_A + 1];

/* subroutines */

inline void setmax(int &a, int b) { if (a < b) a = b; }

/* main */

int main() {
  int n;
  scanf("%d", &n);

  for (int i = 0; i < n; i++) {
    int ai;
    scanf("%d", &ai);

    int maxd = dp[1];
    for (int p = 2; p * p <= ai; p++)
      if (ai % p == 0)
	setmax(maxd, max(dp[p], dp[ai / p]));

    setmax(dp[ai], maxd + 1);
  }

  int maxd = 0;
  for (int a = 1; a <= MAX_A; a++) setmax(maxd, dp[a]);

  printf("%d\n", maxd);
  return 0;
}