#include <bits/stdc++.h>
using namespace std;

int dp[1000010] = { };

int main() {
	int n;
	cin >> n;
	vector<int> x(n);
	for (int i = 0;i < n;i++) {
		cin >> x[i];
	}
	sort(x.begin(), x.end());

	for (int i = 0;i < n;i++){
		dp[x[i]] = 1;
	}
	for (int i = 0;i < n;i++) {
		set<int> s;
		for (int j = 1;j*j <= x[i];j++) {
			if (x[i] % j == 0) {
				s.insert(x[i] / j);
				s.insert(j);
			}
		}
		for (auto j : s) {
			if (x[i] <= j) {
				continue;
			}
			if (dp[j] != 0) {
				dp[x[i]] = max(dp[x[i]], dp[j] + 1);
			}
		}
	}
	int ma = 1;
	for (int i = 0;i < n;i++) {
		ma = max(ma, dp[x[i]]);
	}
	cout << ma << endl;


	return 0;
}