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 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(); } }