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Given an Avail integer, answer which power of two it is. 1->0, 2->1, 4->2, 8->3, etc. If the number is not a power of two, answer -1.
Given an Avail integer, answer which power of two it is. 1->0, 2->1, 4->2, 8->3, etc. If the number is not a power of two, answer -1.