#include <algorithm>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <iostream>
#include <map>
#include <memory>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <vector>
#include <list>

using namespace std;

typedef long long ll;

#define sz size()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(c) (c).begin(), (c).end()
#define rep(i,a,b) for(ll i=(a);i<(b);++i)
#define clr(a, b) memset((a), (b) ,sizeof(a))
#define ctos(d) string(1,d)
#define print(x) cout<<#x<<" = "<<x<<endl;

#define MOD 1000000007

ll d[1000005];

int isPrime(int n) {
  int i;

  if (n < 2) {
    return 0;
  }
  else if (n == 2) {
    return 1;
  }

  if (n % 2 == 0) {
    return 0;
  }

  for (i = 3; i * i <= n; i += 2) {
    if (n % i == 0) {
      return 0;
    }
  }

  return 1;
}

int main() {
  ll n;
  cin >> n;
  clr(d, 0);
  rep(i, 0, n) {
    ll a;
    cin >> a;
    d[a] = 1;
  }
  vector<int> v;
  rep(i,2,1005){
    if(isPrime(i)==0)continue;
    rep(j,1,20){
      if(pow(i,j)>1000000)break;
      v.pb(pow(i,j));
    }
  }
  rep(i,0,1000005){
    if(d[i]==0)continue;
    rep(j,0,v.sz){
      if(i*v[j]>1000000)continue;
      if(d[i*v[j]]!=0){
        d[i*v[j]] = max(d[i*v[j]],d[i]+1);
      }
    }
  }
  ll mx = 0;
  rep(i,0,1000005){
    mx = max(mx,d[i]);
  }
  cout << mx << endl;
  return 0;
}