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模板
OI模板
[模板]单源最短路
[模板]ST表
[模板]LCA
[模板]线段树
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![Featured image of post [模板]单源最短路](/cover/17.png)
![Featured image of post [模板]ST表](/cover/7.png)
![Featured image of post [模板]LCA](/cover/10.png)
![Featured image of post [模板]线段树](/cover/4.png)