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Super Array

Problem Description

Robin found an array A of size N which he wants to convert into super array.

To do this he decided to choose first or last element do one of the following operation with equal probability B times.

  • Delete the chosen element.
  • Increment the chosen element by one.
  • After performing all operations, if the array consist of atleast C elements greater than the special value of array then the array is called super array.

    Special value is the bitwise XOR of all elements.

    Find and return the total number of possible super array, he can get by performing the above operations.



    Problem Constraints

    1 <= N <= 10

    1 <= A[i] <= 109

    1 <= B, C <= N



    Input Format

    First argument is an integer array A of size N.

    Second argument is an integer B.

    Third argument is an integer C.



    Output Format

    Return an integer denoting the possible number of super array.



    Example Input

    Input 1:

     A = [10, 2, 10, 5]
     B = 3
     C = 3

    Input 2:

     A = [3, 3, 4]
     B = 3
     C = 2



    Example Output

    Output 1:

     1

    Output 2:

     3



    Example Explanation

    Explanation 1:

     Special value will be 7.
     There will be only one possible super array: [10, 2, 10, 8]. 
     Perform three operation by incrementing last element.

    Explanation 2:

     There will be 3 possible super array.



    NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a question? Checkout Sample Codes for more details.
    Start solving Super Array on Interview Code Editor
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