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

#define all(v) v.begin(),v.end()
using ll = long long;
using ull = unsigned long long;
using vll=vector<ll>;
using vvll = vector<vector<ll>>;

int main(){
    ll N;
    cin>>N;
    vll A(1e6+1);
    for(int i=0;i<N;i++){
        ll a;
        cin>>a;
        A[a]++;
    }

    vll dp(A.size(),-1);
    for(int i=1;i<=1e6;i++){
        if(!A[i])continue;
        if(dp[i]==-1)dp[i]=1;
        for(int j=2;i*j<=1e6;j++){
            if(!A[i*j])continue;
            dp[i*j]=max(dp[i*j],dp[i]+1);
        }
    }
    ll ans=0;
    for(auto x:dp) ans=max(ans,x);
    cout << ans << endl;
}