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

using namespace std;

const int kMaxN = 1e6 + 5;

int n, mx, c[kMaxN], f[kMaxN];

signed main() {
  cin.tie(0)->ios::sync_with_stdio(0);
  cin >> n;
  for (int i = 1, x; i <= n; i++) {
    cin >> x, c[x]++;
  }
  for (int i = 1; i <= 1e6; i++) {
    if (!c[i]) continue;
    f[i] += c[i];
    for (int j = 2 * i; j <= 1e6; j += i) {
      f[j] = max(f[j], f[i]);
    }
    mx = max(mx, f[i]);
  }
  cout << mx;
}