import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    ArrayList<Integer> xList = new ArrayList<Integer>();
    for(int i = 0; i < N; i++) {
      xList.add(sc.nextInt());
    }
    Collections.sort(xList);
    int A = xList.get(xList.size() - 1);
    int[] dp = new int[A + 1];
    for(int i = 1; i < A + 1; i++) {
      if(xList.contains(i)) {
        dp[i] = 1;
      } else {
        dp[i] = -1;
      }
    }
    int ans = 0;
    for(int i = 1; i < A + 1; i++) {
      ans = Math.max(ans, dp[i]);
      if(dp[i] > 0) {
        for(int j = 2 * i; j < A + 1; j += i) {
          if(dp[j] > 0) dp[j] = Math.max(dp[j], 1 + dp[i]);
        }
      }
    }
    System.out.println(ans);
  }
}