package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func main() {
	sc.Split(bufio.ScanWords)
	MAX := 1000002
	n := nextInt()
	x := make([]int, n)
	for i := 0; i < n; i++ {
		x[i] = nextInt()
	}
	dp := make([]int, MAX)
	for _, s := range x {
		dp[s] = 1
	}
	ans := 0
	for i := 1; i < MAX; i++ {
		if dp[i] <= 0 {
			continue
		}
		for j := i * 2; j < MAX; j += i {
			if dp[j] >= 1 {
				dp[j] = max(dp[j], dp[i]+1)
			}
		}
		ans = max(ans, dp[i])
	}
	fmt.Println(ans)
}

func max(a, b int) int {
	if a < b {
		return b
	}
	return a
}


var sc = bufio.NewScanner(os.Stdin)
var rdr = bufio.NewReaderSize(os.Stdin, 1000000)

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}