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Given a list of integers, made up of (hopefully) a small number of long runs
of consecutive integers, compute a representation of the form
((start1, end1), (start2, end2) ...). Then answer the question "was x present
in the original list?" in time O(log(# runs)).
� Nc C s� t | �}g }d}xrtt|��D ]b}|d t|�k rL|| ||d d krLq ||d |d � }|jt|d |d d �� |}q W t|�S )a Represent a list of integers as a sequence of ranges:
((start_0, end_0), (start_1, end_1), ...), such that the original
integers are exactly those x such that start_i <= x < end_i for some i.
Ranges are encoded as single integers (start << 32 | end), not as tuples.
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_decode_range" s r c C sz t | d�}tj||�}|dkrNt||d �\}}|| koD|k n rNdS |t|�k rvt|| �\}}|| krvdS dS )z=Determine if `int_` falls into one of the ranges in `ranges`.r r TF)r �bisectZ bisect_leftr r )Zint_r
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