macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        #[allow(unused_mut)]
        let mut s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        #[allow(non_snake_case)]
        #[allow(unused_mut)]
        let mut $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };

    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };

    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };

    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

#[allow(unused_macros)]
macro_rules! debug {
    ($($a:expr),*) => {
        eprintln!(concat!($(stringify!($a), " = {:?}, "),*), $($a),*);
    }
}

fn gcd(mut x: u32, mut y: u32) -> u32 {
    let mut t = 0;
    while y != 0 {
        t = x % y;
        x = y;
        y = t;
    }
    x
}

use std::cmp;

fn divisor(n: u32) -> Vec<u32> {
    let mut ret = Vec::new();
    let sqrtn = (n as f64).sqrt() as u32;
    for i in 1..sqrtn + 1 {
        if n % i == 0 {
            ret.push(i);
            if i * i != n {
                ret.push(n / i);
            }
        }
    }
    ret.sort();
    ret
}

fn main() {
    input! {
        n: usize,
        arr: [usize; n],
    }
    arr.sort();
    let mut dp = vec![0; 1_000_100];
    for x in &arr {
        dp[*x] = 1;
    }
    for i in 1..1_000_001 {
        if dp[i as usize] != 0 {
            let divisors = divisor(i);
            for d in divisors {
                if d != i {
                    dp[i as usize] = cmp::max(dp[i as usize], dp[d as usize] + 1)
                }
            }
        }
    }
    let mut ans = 0;
    for x in &arr {
        ans = cmp::max(ans, dp[*x]);
    }
    println!("{}", ans);
}