#include <stdio.h>
#define MAX 10000
int A[MAX]={0};
int n=0;
int demSoHoanThien();
void main()
{
	int d;
	scanf_s ("%d",&n);
	for (int i=0;i<n;i++)
	scanf_s ("%d",&A[i]);
	d=demSoHoanThien();
	printf ("%d",d);

}


int demSoHoanThien()
{
	int dem=0,tong=0;
	for (int i=0;i<n;i++)
	{
		for (int j=1;j<A[i];j++)
			if (A[i]%j=0)
				tong+=i;
		if (tong==A[i])
		dem++;
	}
	return dem;
}