#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vmi = vector<mint>;
using vvmi = vector<vmi>;
using vvvmi = vector<vvmi>;
#define all(a) (a).begin(), (a).end()
#define rep2(i, m, n) for (int i = (m); i < (n); ++i)
#define rep(i, n) rep2(i, 0, n)
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)
class Primes{
    private:
        int size_p;
        vector<bool> is_p;
        vector<int> primes;
        
        vector<int> mobius;
        void eratos(int n){
            for(int i=2; i<=n; i++){
                if(minfactor[i] < i)continue;
                primes.emplace_back(i);
                mobius[i] = -1;
                is_p[i] =true;
                for(int j = 2*i; j<=n; j+=i){
                    minfactor[j] = min(i, minfactor[j]);
                    mobius[j] = ((j/i) % i == 0) ? 0 : -mobius[j];
                }
            }
        }
        
    public:
        vector<int> minfactor;
        Primes(int n){
            size_p = n;
            rep(i, size_p+1)is_p.emplace_back(false);
            rep(i, size_p+1)minfactor.emplace_back(i);
            rep(i, size_p+1)mobius.push_back(1);
            mobius[1] = 1;
            eratos(size_p);
            
        }

        bool isprime(int n){
            return is_p[n];
        }
        vector<int> listPrimes(){
            return primes;
        }
        int getMobius(int n){return mobius[n];}

};

int main(){
    int n; cin >> n;
    int mx = 0;
    vi a(n); rep(i, n){
        cin >> a[i];
        mx = max(mx, a[i]);
    }

    Primes pr(mx+1);
    vvi cnt(mx+1);
    rep2(i, 1, mx+1){
        for(int j = i; j <= mx; j += i){
            cnt[j].push_back(i);
        }
    }
    
    vi dp(mx+1, 0);
    rep(i, n){
        int tmp = 0;
        for(auto j : cnt[a[i]]){
            tmp = max(tmp, dp[j]);
        }
        dp[a[i]] = max(dp[a[i]], tmp+1);
    }
    int ans = 0;
    rep(i, mx+1)ans = max(dp[i], ans);
    cout << ans << endl;

    return 0;
}