Лимит времени 2000/4000/4000/4000 мс. Лимит памяти 65000/65000/65000/65000 Кб.  Question by Ibrahim Mesecan. 
Сложность Альфа
  
Bills of City Water Company 
Write a program for the bills of the city water company.  The water rates are computed as follows:
 
- $10 fixed price for the first 4 tones
 
- If it exceeds 4 tones; $0.005 for each additional litre.
 
 
Your program will first get the amount of water used (litres). It will then print the amount due from the user.
Input specification   
You will be given the amount in liters - an integer 
number (num) where 0 ≤ num  ≤ 50000  
Output specification   
Show the amount due from the user. The number will contain at most two digits after the floating point.
 
 
Sample Input I   
  2367    | 
Sample Input II   
  5387  |  
Sample Output I  
  10
 | 
Sample Output II  
  16.93
 |    
 
Для отправки решений необходимо выполнить вход.
  
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