#include <stdio.h>

int N,X[100100],D[1001001]; bool C[1001001];

int main()
{
	int N; scanf ("%d",&N);
	for (int i=0;i<N;i++){
		int x; scanf ("%d",&x);
		C[x] = 1;
	}

	int ans = 0;
	for (int i=1;i<=1000000;i++) if (C[i]){
		D[i]++;
		if (ans < D[i])
			ans = D[i];

		for (int j=i*2;j<=1000000;j+=i) if (C[j] && D[j] < D[i]) D[j] = D[i];
	}

	printf ("%d\n",ans);
	return 0;
}