#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define int ll
#define rep(i,n) for(int i = 0; i < (int)(n); ++i)
#define all(c) begin(c), end(c)
//#define fill(c,v) fill(decltype(v)*(begin(c)), decltype(v)*(end(c)), v)

int n;
int have[1000010];
int dp[1000010];

int rec(int k){
    int &res = dp[k];
    if(res != -1) return res;
    if(k == 1) return res = 1;
    res = 1;
    for(int i = 1; i*i <= k; ++i){
        if(k%i == 0){
            if(have[i]) res = max(res, rec(i)+1);
            if(i != 1 && have[k/i]) res = max(res, rec(k/i)+1);
        }
    }
    return res;
}

decltype(0) main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    while(cin >> n){
        memset(dp, -1, sizeof dp);
        memset(have, 0, sizeof have);
        int x;
        rep(i,n) cin >> x, have[x] = true;
        rep(i,1000010) if(have[i]) rec(i);
        // rep(i,20) cout << dp[i] << ' ';
        // cout << endl;
        cout << *max_element(dp,dp+1000010) << endl;
    }
}