Your question is Array Rearrangement Optimization. Start with the requirements on the right.
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In a Confluent configuration comparison, array a contains fixed baseline values and array b contains values that may be rearranged. Rearrange b to maximize the sum of the elements placed against strictly smaller elements in a.
Each element of b can be used once. An element contributes its value to the result only when it is greater than the corresponding element of a; otherwise, it contributes zero. Return the maximum possible sum.
Implement maximize_winning_sum(a, b), where a and b are arrays of integers with equal length. Return an integer representing the maximum achievable sum. You do not need to return the rearranged array.
def maximize_winning_sum(a, b):