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 cnts = vec![0usize; 300001];
    for &v in a.iter() {
        if v > 1 {
            cnts[v] = cnts[v].max(cnts[1] + 1);
        } else {
            cnts[1] = 1;
        }
        for i in 2..=(v as f64).sqrt() as usize {
            if v % i == 0 {
                cnts[v] = cnts[v].max(cnts[i] + 1);
                cnts[v] = cnts[v].max(cnts[v/i] + 1);
            }
        }
    }
    println!("{}", cnts.iter().max().unwrap());
}