#include <bits/stdc++.h>
#define int long long

using namespace std;

const int kMaxN = 1e6 + 5;

int n, mx, f[kMaxN];

signed main() {
  cin.tie(0)->ios::sync_with_stdio(0);
  cin >> n;
  for (int i = 1, x; i <= n; i++) {
    cin >> x;
    for (int j = 1; j * j <= x; j++) {
      if (x % j == 0) {
        f[x] = max(f[x], max(f[j], f[x / j]) + 1);
      }
    }
    mx = max(mx, f[x]);
  }
  cout << mx;
}