花花酱 Disjoint-set/Union-find Forest - 刷题找工作 SP1

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代码 (Solution)： https://zxi.mytechroad.com/blog/data-structure/sp1-union-find-set/

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LeetCode 684. Redundant Connection https://www.youtube.com/watch?v=4hJ721ce010
LeetCode 685. Redundant Connection II https://youtu.be/lnmJT5b4NlM

References：
https://en.wikipedia.org/wiki/Disjoint-set_data_structure
https://www.cs.princeton.edu/courses/archive/spring13/cos423/lectures/UnionFind.pdf

By Difficulty：
* Easy: https://www.youtube.com/watch?v=rRMdxFA-8G4&list=PLLuMmzMTgVK7eabhqdNs1wQv0cFEbd048
* Medium: https://www.youtube.com/watch?v=seQnf-5hlBo&list=PLLuMmzMTgVK6-w5poVP89Kl38S9UryDHx
* Hard: https://www.youtube.com/watch?v=UjiFFYU3EKM&list=PLLuMmzMTgVK6qfhuW2tarjHgHh3G8XpUF

By Category：
* 动态规划 (Dynamic programming) https://www.youtube.com/watch?v=MSNSqU3BnXk&list=PLLuMmzMTgVK7vEbeHBDD42pqqG36jhuOr
* 设计/数据结构 (Design/Data Structure) https://www.youtube.com/watch?v=JL4OjKV_pGE&list=PLLuMmzMTgVK6M8XmintFnrd1VN-VBc0t0
* 树 (Binary Tree) https://www.youtube.com/watch?v=L_t2x3nH61k&list=PLLuMmzMTgVK7ug02DDoQsf50OtwVDL1xd
* 搜索 (Search) https://www.youtube.com/watch?v=oUeGFKZvoo4&list=PLLuMmzMTgVK423Mj1n_OaOAZZ6k5fNxyN
* 图 (graph) https://www.youtube.com/watch?v=ln_mc5LtL5M&list=PLLuMmzMTgVK5gFVMpryw0LkJp4l9WTtdM
* 哈希表 (HashTable) https://www.youtube.com/watch?v=tNtk_rwbaIk&list=PLLuMmzMTgVK48qe6jxrVW-FHNrm7g5mop
* 贪心 (Greedy) https://www.youtube.com/watch?v=3kJpg7Smc3E&list=PLLuMmzMTgVK5Igci8P3d88XpoyeIA1Fl-
* 链表 (Linked List) https://www.youtube.com/watch?v=bxCb37nLXWM&list=PLLuMmzMTgVK6a-2aAwPieEIIuIJY6JTSq
* 数学题 (Math) https://www.youtube.com/watch?v=ddFvTWmVUEA&list=PLLuMmzMTgVK70LRovZHZwfRaMTboc6Xdc
* 几何 (Geometry) https://www.youtube.com/watch?v=8Kd-Tn_Rz7s&list=PLLuMmzMTgVK6b1bJ4eovW1u_vrRE6mK6Q
* 字符串 (String) https://www.youtube.com/watch?v=fZ8nkk220M4&list=PLLuMmzMTgVK49Hph4vV8DAzGZpj4azwmz
* 模拟 (Simulation) https://www.youtube.com/watch?v=Vp5qRtuyln4&list=PLLuMmzMTgVK7nhHbo-hE60XDciDX62HvR
* 所有题目 (All) https://www.youtube.com/watch?v=A6iCX_5xiU4&list=PLLuMmzMTgVK66JImslfqAJLovRAyQKAas

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