fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    let mut maxvals = vec![0usize; 300001];
    for &v in a.iter() {
        maxvals[v] = maxvals[v].max(1);
        if v == 1 { continue; }
        for i in 1..=(v as f64).sqrt().floor() as usize {
            if v % i == 0 {
                maxvals[v] = maxvals[v].max(maxvals[i]+1);
                if i > 1 {
                    maxvals[v] = maxvals[v].max(maxvals[v/i]+1);
                }
            }
        }
    }
    println!("{}", maxvals.iter().max().unwrap());
}