/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.06.02 18:41:05
**/

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

int main() {
    int n;cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    sort(a.begin(), a.end());
    vector<int> b(1000000,-1);
    for (int i = 0; i < n; i++) {
        b[a[i]-1] = i;
    }
    vector<int> c(n,1);
    int ans = 1;
    for (int i = 0; i < 1000000; i++) {
        if (b[i] == -1) continue;
        for (int j = 2 * i + 2; j <= 1000000; j += i + 1) {
            if (b[j-1] == -1) continue;
            c[b[j-1]] = max(c[b[j-1]],c[b[i]] + 1);
            ans = max(ans,c[b[j-1]]);
        }
    }
    cout << ans << endl;
    return 0;
}