What if there are lots of merges and the number of disjoint intervals are small compared to the data stream's size?
如果合并次数非常多，与数据流的规模相比不相交区间的数目很少，应当做怎样的优化？
What if there are lots of merges and the number of disjoint intervals are small compared to the data stream's size?
如果合并次数非常多，与数据流的规模相比不相交区间的数目很少，应当做怎样的优化？
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