public class MyClass {
    public static void main(String args[]) {
        java.util.Scanner scanner = new java.util.Scanner(System.in);
        int studentCount = scanner.nextInt();
        double examMark = 0;
        int topStudents = 0;
        int students4and5 = 0;
        int students3and4 = 0;
        int failedStudents = 0;
        double allMarksSum = 0.0;
        for (int i = 1; i <= studentCount; i++) {
            examMark = scanner.nextDouble();
            if (examMark >= 5.00) {
                topStudents++;
            }
            if (examMark >= 4.00 && examMark <= 4.99) {
                students4and5++;
            }
            if (examMark >= 3.00 && examMark <= 3.99) {
                students3and4++;
            }
            if (examMark < 3.00) {
                failedStudents++;
            }
            allMarksSum += examMark;
        }
        System.out.printf("Top students: %.2f%%\n",(double)topStudents/studentCount * 100);
        System.out.printf("Between 4.00 and 4.99: %.2f%%\n",(double)students4and5/studentCount * 100);
        System.out.printf("Between 3.00 and 3.99: %.2f%%\n",(double)students3and4/studentCount * 100);
        System.out.printf("Fail: %.2f%%\n",(double)failedStudents/studentCount * 100);
        System.out.printf("Average: %.2f",(double)allMarksSum/studentCount);
    }
}