include

using namespace std;

int main() {

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

}