#include<iostream>
#include<vector>
#include<string>
#include<algorithm>	
#include<map>
#include<set>
#include<utility>
#include<cmath>
#include<cstring>
#include<queue>
#include<cstdio>
#include<sstream>
#include<iomanip>
#define loop(i,a,b) for(int i=a;i<b;i++) 
#define rep(i,a) loop(i,0,a)
#define pb push_back
#define mp make_pair
#define all(in) in.begin(),in.end()
#define shosu(x) fixed<<setprecision(x)
using namespace std;
//kaewasuretyuui
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pii> vp;
typedef vector<vp> vvp;
typedef pair<int,pii> pip;
typedef vector<pip>vip;
const double PI=acos(-1);
const double EPS=1e-8;
const int inf=1<<30;
int main(){
	int n;
	cin>>n;
	vi in(2000000);
	int ma=-1;
	rep(i,n){
		int a;
		cin>>a;
		ma=max(ma,a);
		in[a]=true;
	}
	vi dp(ma+1);
	loop(i,1,ma+1)if(in[i]){
		dp[i]=max(dp[i],1);
		for(int j=i*2;j<ma+1;j+=i)if(in[j])
			dp[j]=max(dp[j],dp[i]+1);
	}
	int out=-1;
	rep(i,ma+1)out=max(out,dp[i]);
	cout<<out<<endl;
}