import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        HashMap<Integer, Integer> map = new HashMap<>();
        int ans = 1;
        for (int i = 0; i < n; i++) {
            int max = 0;
            int x = sc.nextInt();
            if (map.containsKey(1) && x != 1) {
                max = 1;
            }
            for (int j = 2; j <= Math.sqrt(x); j++) {
                if (x % j == 0) {
                    if (map.containsKey(j)) {
                        max = Math.max(max, map.get(j));
                    }
                    if (map.containsKey(x / j)) {
                        max = Math.max(max, map.get(x / j));
                    }
                }
            }
            map.put(x, max + 1);
            ans = Math.max(ans, max + 1);
        }
        System.out.println(ans);
    }
}