Official algorithmic problem description and constraints.
You are given an array π΄ of size π.
Your task is to determine the minimum number of elements that need to be removed from the array π΄ such that the bitwise OR of the remaining elements is 2π₯β1 for some integer π₯ (π₯β₯0).
Note that the bitwise OR of an empty array is considered to be 0.
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