#include <bits/stdc++.h>
#define REP(i,n) for(int i = 0; i < (int)(n); ++i)
using namespace std;
int dp[1000010] = {};

vector<int> getDivisor(int n){
    vector<int> v;
    for(int i=1; i*i<=n; i++){
        if(n%i==0){
            v.push_back(i);
            if(i!=n/i){
                v.push_back(n/i);
            }
        }
    }
    sort(v.begin(),v.end());
    return v;
}

int main(){
    int N;
    cin >> N;
    int temp = 0;
    vector<int> a;
    REP(i,N){
        cin >> temp;
        a.push_back(temp);
    }
    sort(a.begin(),a.end());
    for(auto p: a){
        temp = 1;
        for(auto q: getDivisor(p)){
            if(p==q) continue;
            temp = max(temp,dp[q]+1);
        }
        dp[p] = temp;
    }
    int ans = 0;
    REP(i,1000010){
        ans = max(ans, dp[i]);
    }
    cout << ans << endl;
    return 0;
}