#include "bits/stdc++.h"
using namespace std;
typedef long long ll;

// enum_div 約数列挙O(√N)
// 順番はバラバラ
template<typename T>
vector<T> enum_div(T n) {
    vector<T> ret;
    for (T i = 1; i * i <= n; ++i)
    {
        if (n % i == 0)
        {
            ret.push_back(i);
            if (i * i != n)
            {
                ret.push_back(n / i);
            }
        }
    }
    return ret;
}

int main() {
    int n; cin >> n;
    vector<int> v(3 * 100000 + 1, 0);
    int ans = 0;
    for (int i = 0; i < n; i++) {
        int a; cin >> a;
        if (a == 1) v[1] = 1;
        else {
            for (int b : enum_div(a)) {
                if (a == b) continue;
                v[a] = max(v[a], v[b] + 1);
            }
        }
        ans = max(ans, v[a]);
    }
    cout << ans << endl;
    return 0;
}