#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<int(n);i++)

vector<int> div(int x){
  vector<int> rt;
  for(int i=1;i*i<=x;i++){
    if(x%i==0){
      rt.push_back(i);
      if(i*i!=x) rt.push_back(x/i);
    }
  }
  return rt;
}

int main(){
  int n;
  cin>>n;
  vector<int> a(n);
  rep(i,n) cin>>a.at(i);
  map<int,int> mp;
  rep(i,n){
    vector<int> d=div(a.at(i));
    int nw=0;
    for(int x:d){
      if(mp.count(x)) nw=max(nw,mp.at(x));
    }
    mp[a.at(i)]=nw+1;
  }
  int ans=0;
  for(auto [dv,sc]:mp) ans=max(ans,sc);
  cout<<ans<<'\n';
}