#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(){
    int n; cin >> n;
    vector<int> a(n);
    for(auto &it: a) cin >> it;

    vector<int> dp(1000010, 0);
    for(auto &it: a) dp[it] = 1;
    for(int i = 1000000; i > 0; i--){
        int mx = 0;
        for(int j = i*2; j < dp.size(); j += i){
            mx = max(mx, dp[j]);
        }
        dp[i] += mx;
    }

    int ans = 0;
    for(auto &it: dp) ans = max(ans, it);
    cout << ans << endl;
    return 0;
}