Problem Statement  
You are given a int[] marks containing the grades you have received so far in a class. Each grade is between 0 and 10, inclusive. Assuming that you will receive a 10 on all future assignments, determine the minimum number of future assignments that are needed for you to receive a final grade of 10. You will receive a final grade of 10 if your average grade is 9.5 or higher.  
Definition  
 
Constraints  
  marks has between 1 and 50 elements, inclusive.  
  Each element of marks is between 0 and 10, inclusive.  
Examples  
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