数据结构（一）— 跳跃表

• 2019 年 10 月 3 日
• 筆記

1???

????skiplist?????????????????????2???????????????O(logN)?

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• • ??????????????bw???????????????????????????
  • ??????????????????????????
  • ????L1??????????
  • ??bw?????Redis????????????????????????

2???

 ???????????????????????90??????????????????????????9???????????????????6?????????????

?1?????L4??????L4??????10???90????????????120???90??????L3????????????????????????????????????

?2??????10?L3????????40?????90???????

?3???40???????80?????90???????

?4???80???????120?????90????80????????????????????????

?5?????80?L2???????100?????90???????????????????

?6?????80?L1???????90?????90???????

????6?????????3????????????90???????????120????????1????????????????????O(logN)????????????????????????????1w???????????????

3???

???????????????????????????????????????????????????????

1?????10

?1???10?????????L1????.

?2??????????????????????10??L2??

?3??????????????????????10????L3??

?4?????????????????????????????10?????????????3??

2?????30

 ???1???30?????L1??L1?????10????????10?????10???????10L1?????????30???30?bw???????10?????1??

?2????????????30??L2???????10?L2??????????30?L2??

?3?????????????????30?????????????2?? 

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• • ??????????????NULL ???????????
  • ????????????????????????????Redis????32?????????32?????????????????????????????????????null?
  • ????????????????????????????????????????????
    1. ????????????????L1?????????????????????????????????????????????
    2. ?????????????????????????????????????????????????????????????????????????p?????0?1??????????????p?????1?????????????p????????????????1/2???1/4?????????????????p?1/2???????????????

4???

 ???????????????????????????????????????????60??????

?1?????60?????4?????2?????

?2???L2???????????????????????bw???????????L1???????????????

?3?????60????

5???

• • ????????????????????????????????????????????????????
  • bw??????????????????????Redis????????????????
  • ???????????????????????????????????????????????????
  • ?????????????????????????????
  • ???????????????O(logn)??????????????O(logn) ????????????????????O(n).

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