#include<bits/stdc++.h>
using namespace std;
typedef long long ll;


int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);

    int n;
    cin>>n;
    int a[n];
    for(int i=0;i<n;i++) cin>>a[i];
    map<int,int> mp;
    int ans = 1;
    for(int i=0;i<n;i++){
        if(a[i] != 1 && mp.count(1)){
            mp[a[i]] = max(mp[a[i]],mp[1]+1);
        }
        for(int j=2;j*j<=a[i];j++){
            if(a[i]%j==0){
                if(mp.count(j)){
                    mp[a[i]] = max(mp[a[i]],mp[j]+1);
                }
                if(j*j != a[i] && mp.count(a[i]/j)){
                    mp[a[i]] = max(mp[a[i]],mp[a[i]/j]+1);
                }
            }
        }
        mp[a[i]] = max(1,mp[a[i]]);
        //cerr << a[i] << " " << mp[a[i]] << endl;
    }
    for(auto i:mp){
        ans = max(ans,i.second);
    }
    cout << ans << endl;
}