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

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        HashMap<Integer, Integer> counts = new HashMap<>();
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            int max = 0;
            if (counts.containsKey(1)) {
                max++;
            }
            for (int j = 2; j <= Math.sqrt(x); j++) {
                if (x % j == 0) {
                    max = Math.max(max, counts.getOrDefault(j, 0));
                    max = Math.max(max, counts.getOrDefault(x / j, 0));
                }
            }
            counts.put(x, Math.max(counts.getOrDefault(x, 0), max + 1));
        }
        int ans = 0;
        for (int x : counts.values()) {
            ans = Math.max(ans, x);
        }
        System.out.println(ans);
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}