# Union-Find，并查集

## 这组问题的分类上基本延续了九章高级算法班的大纲，加了些听课时候的笔记，和自己之后查资料的思考。

## 刚转专业跟公开课的时候，第一讲就是 Robert Sedgewick 大爷的并查集，当时还很天真的觉得这是个入门知识。。。 后来题做多了觉得这类问题掌握技巧之后确实也不难，大爷诚不我欺。


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