#ifdef NACHIA
#define _GLIBCXX_DEBUG
#else
#define NDEBUG
#endif
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>
#include <array>
#include <cmath>
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(int i=0; i<int(n); i++)
#define repr(i,n) for(int i=int(n)-1; i>=0; i--)
const i64 INF = 1001001001001001001;
#include <atcoder/modint>
using Modint = atcoder::static_modint<10000'00007>;
using namespace std;

void testcase(){
    int N; cin >> N;
    vector<int> A(N); rep(i,N) cin >> A[i];
    vector<vector<int>> divs(300001);
    for(int i=1; i<int(divs.size()); i++) for(int j=i*2; j<int(divs.size()); j+=i)
        divs[j].push_back(i);
    vector<int> Q(300001, 0);
    for(int a : A){
        int p = 0;
        for(int d : divs[a]) if(Q[d] > p) p = Q[d];
        Q[a] = p;
    }
    int ans = *max_element(Q.begin(), Q.end());
    cout << ans << endl;
}

int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    testcase();
    return 0;
}