import java.util.*;
import java.io.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        HashMap<Integer, Integer> map = new HashMap<>();
        int ans = 0;
        String[] line = br.readLine().split(" ", n);
        for (int i = 0; i < n; i++) {
            int x = Integer.parseInt(line[i]);
            int max = 0;
            if (x != 1 && map.containsKey(1)) {
                max = map.get(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);
    }
}