use std::collections::HashMap;


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 result = HashMap::new();
    for &v in a.iter() {
        let mut val = 1usize;
        if v > 1 {
            for i in 1..=(v as f64).sqrt() as usize {
                if v % i == 0 {
                    val = val.max(1 + *result.get(&i).unwrap_or(&0usize));
                    if i > 1 {
                        val = val.max(1 + *result.get(&(v/i)).unwrap_or(&0usize));
                    }
                }
            }
        }
        if !result.contains_key(&v) || val > *result.get(&v).unwrap() {
            result.insert(v, val);
        }
    }
    println!("{}", result.values().max().unwrap());
}