Exam

def calculate_statistics(scores):
    total_students = len(scores)
    top_students = sum(1 for score in scores if score >= 5.00)
    between_4_4_99 = sum(1 for score in scores if 4.00 <= score <= 4.99)
    between_3_3_99 = sum(1 for score in scores if 3.00 <= score <= 3.99)
    fail_students = total_students - (top_students + between_4_4_99 + between_3_3_99)
    average_score = sum(scores) / total_students

    top_students_percent = (top_students / total_students) * 100
    between_4_4_99_percent = (between_4_4_99 / total_students) * 100
    between_3_3_99_percent = (between_3_3_99 / total_students) * 100
    fail_students_percent = (fail_students / total_students) * 100

    statistics = {
        "top_students_percent": "{:.2f}".format(top_students_percent),
        "between_4_4_99_percent": "{:.2f}".format(between_4_4_99_percent),
        "between_3_3_99_percent": "{:.2f}".format(between_3_3_99_percent),
        "fail_students_percent": "{:.2f}".format(fail_students_percent),
        "average_score": "{:.2f}".format(average_score)
    }

    return statistics


num_students = int(input())
scores = []

for _ in range(num_students):
    score = float(input())
    scores.append(score)

statistics = calculate_statistics(scores)

print("Top students: {}%".format(statistics["top_students_percent"]))
print("Between 4.00 and 4.99: {}%".format(statistics["between_4_4_99_percent"]))
print("Between 3.00 and 3.99: {}%".format(statistics["between_3_3_99_percent"]))
print("Fail: {}%".format(statistics["fail_students_percent"]))
print("Average: {}".format(statistics["average_score"]))