#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
const int INF = 1 << 30;
signed main() { 
  ios::sync_with_stdio(false); cin.tie(0);
  int n;
  cin >> n;
  vector<int> dp(303030, -INF);
  dp[1] = 0;
  for (int i = 0; i < n; i++) {
    int a;
    cin >> a;
    vector<int> div;
    for (int j = 1; j * j <= a; j++) {
      if (a % j == 0) {
        div.push_back(j);
        if (a / j != j && a / j != a) div.push_back(a / j);
      }
    }
    sort(div.rbegin(), div.rend());
    for (int j : div) {
      dp[a] = max(dp[a], dp[j] + 1);
    }
  }
  cout << *max_element(dp.begin(), dp.end()) << endl;
  return 0;
}