#include <algorithm>
#include <bitset>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#define MOD (1000000007l)
#define ll long long
#define rep(i, n) for (ll i = 0; i < (n); i++)

using namespace std;

void solve() {
  ll N;
  cin >> N;

  vector<bool> primes_vec(N+1, true);
  primes_vec[0] = false;
  primes_vec[1] = false;
  for (ll i = 2; i <= N / 2; i++) {
    if (not primes_vec[i]) continue;
    for (ll j = 2; i * j <= N; j++) primes_vec[i*j] = false;
  }
  set<ll> primes;
  rep (i, N+1) if (primes_vec[i]) primes.insert(i);

  unordered_map<ll, ll> memo;

  rep (i, N) {
    ll A;
    cin >> A;
    if (A == 1) memo[1] = 1;
    else if (memo[A] == 0) memo[A] = memo[1] + 1;
    for (auto it: primes) {
      if (it * it > A) break;
      if (A % it) continue;
      ll tmp = max(memo[it] + 1, memo[A / it] + 1);
      if (tmp > memo[A]) memo[A] = tmp;
    }
  }

  ll ans = 0;
  for (auto it: memo) if (ans < it.second) ans = it.second;
  cout << ans << endl;
}

int main(void) {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout.precision(12);
  cout << fixed;
  solve();
  return 0;
}