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23-Day4.md

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第四次课程小结

B+ Tree

所有的leaves在最底层都应该出现
每个点的keys的数量是受限制的

insert:
正常插入;叶节点溢出;叶节点溢出的同时,上一层结点同样溢出;仅有两层时的溢出;

Hash Tables

复杂度:往往是O(1),可能会出现需要的桶数过多的情况,但practice perfect;
希望所采用的n个桶承载的均匀;