use std::io::Read;

fn run() {
    let mut s = String::new();
    std::io::stdin().read_to_string(&mut s).unwrap();
    let mut it = s.trim().split_whitespace();
    it.next();
    let a: Vec<usize> = it.map(|s| s.parse().unwrap()).collect();
    let m = 300_000;
    let mut f: Vec<usize> = (0..=m).collect();
    for i in 2.. {
        if i * i > m {
            break;
        }
        if f[i] == i {
            for j in i..=(m / i) {
                f[j * i] = i;
            }
        }
    }
    let mut dp = vec![0; m + 1];
    for x in a {
        if x == 1 {
            dp[1] = 1;
            continue;
        }
        let mut d = vec![1];
        let mut a = x;
        while a > 1 {
            let p = f[a];
            let mut cnt = 0;
            while a % p == 0 {
                cnt += 1;
                a /= p;
            }
            let mut mul = 1;
            let len = d.len();
            for _ in 0..cnt {
                mul *= p;
                for i in 0..len {
                    let v = d[i] * mul;
                    d.push(v);
                }
            }
        }
        for d in d {
            if d != x {
                dp[x] = std::cmp::max(dp[x], dp[d] + 1);
            }
        }
    }
    let ans = dp.into_iter().max().unwrap();
    println!("{}", ans);
}

fn main() {
    run();
}