Grades

students = int(input())
grades = 0
fails = 0
weak = 0
better = 0
best = 0

for i in range(students):
  grade = float(input())
  grades += grade
  if grade < 3:
    fails += 1
  elif 3 <= grade <= 3.99:
    weak += 1
  elif 4 <= grade <= 4.99:
    better += 1
  elif grade >= 5:
    best += 1

print(f"Top students: {((best / (students)) * 100):.2f}%")
print(f"Between 4.00 and 4.99: {((better / (students)) * 100):.2f}%")
print(f"Between 3.00 and 3.99: {((weak / (students)) * 100):.2f}%")
print(f"Fail: {((fails / (students)) * 100):.2f}%")
print(f"Average: {(grades / (students)):.2f}")