import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        List<List<Integer>> lengths = new ArrayList<>();
        lengths.add(new ArrayList<>());
        lengths.get(0).add(1);
        while (n-- > 0) {
            int y = sc.nextInt();
            for (int i = lengths.size() - 1; i >= 0; i--) {
                boolean enable = false;
                for (int x : lengths.get(i)) {
                    enable = (y % x == 0);
                    if (enable) {
                        break;
                    }
                }
                if (enable) {
                    if (i == lengths.size() - 1) {
                        lengths.add(new ArrayList<>());
                    }
                    lengths.get(i + 1).add(y);
                    break;
                }
            }
        }
        System.out.println(lengths.size() - 1);
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}