include

using namespace std;

int main() {

int n;
cin >> n;
int count = 0;
for (int i = 0; i < n; i++) {
	int score;
	cin >> score;
	if (score >= 80 && score % 5 == 0 && score % 10 != 0) {
		count++;
	}
}
cout << count << endl;
return 0;

}