Game of Invervals

n = int(input())
points = 0
p1 = 0
p2 = 0
p3 = 0
p4 = 0
p5 = 0
invalids = 0

for i in range(n):
  num = int(input())
  if num < 0 or num > 50:
    invalids += 1
    points /= 2
  elif 0 <= num <= 9:
    p1 += 1
    points += num * 0.2
  elif 10 <= num <= 19:
    p2 += 1
    points += num * 0.3
  elif 20 <= num <= 29:
    p3 += 1
    points += num * 0.4
  elif 30 <= num <= 39:
    p4 += 1
    points += 50
  elif 40 <= num <= 50:
    p5 += 1
    points += 100

print(f"{points:.2f}")
print(f"From 0 to 9: {((p1 / n) * 100):.2f}%")
print(f"From 10 to 19: {((p2 / n) * 100):.2f}%")
print(f"From 20 to 29: {((p3 / n) * 100):.2f}%")
print(f"From 30 to 39: {((p4 / n) * 100):.2f}%")
print(f"From 40 to 50: {((p5 / n) * 100):.2f}%")
print(f"Invalid numbers: {((invalids / n) * 100):.2f}%")