func (rb *Bitmap) Rank(x uint64) uint64 is good. But I just need Rank(end)-Rank(start) to be O(end-start), not O(end)
func (rb *Bitmap) Rank(x uint64) uint64
Rank(end)-Rank(start)
O(end-start)
O(end)
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RoaringBitmap
RoaringBitmap
RoaringBitmap
