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strongly connected component 在 [理工] 演算法DFS找strong connected component - 批踢踢實業坊 的推薦與評價


作者mogahuang (mogahuang)
看板Grad-ProbAsk
標題[理工] 演算法 DFS找strong connected component
時間Sun Nov 13 18:34:41 2016

各位大大安安

請問利用兩次DFS 找 scc 在第二步是用第一次v.f的大小選點，但要如何選才能切割出scc?



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→ gigayaya: 在srep.2走出一個cycle就是一個scc 11/13 18:58
→ ken52011219: 以G^T為例，G的u.f最大者為b(16)以它作為起點 11/13 19:01
→ ken52011219: DFS可選擇做a(14) or f(4)因 由大到小所以G^T選擇a 11/13 19:02
→ ken52011219: 我搞混了 只剩a可以做所以選擇a 11/13 19:04
→ ken52011219: 應該看c 因c可選擇d(9) g(7)所以G^T DFS(c)選擇d 11/13 19:06
→ ken52011219: 做完一個CYCLE為一個強連通 11/13 19:07
推 kyuudonut: 一直覺得這個解法超妙的 值得推一下XD 11/13 19:14
→ mogahuang: Gigi大 可是在原本的圖他不是也可以走一個cycle嗎？？ 11/13 19:27
→ mogahuang: 我懂了，是用第一次的結束時間在第二次的圖上跑，因為 11/13 19:31
→ mogahuang: 單向會造成不連通，所以在做DFS時如果是scc的話會回到 11/13 19:31
→ mogahuang: 起點這樣嗎？？ 11/13 19:31
→ ken52011219: 可以看成類似第一個DFS是找出單方向為connect的點 11/13 19:47
→ ken52011219: 第二次DFS找出 另外一個方向的connect 11/13 19:47
→ ken52011219: 且為第一個DFS找出的connect的基礎上 11/13 19:48
→ gigayaya: Step2的圖是原本圖的反向 挑的順序是圖1DFS結束時間從 11/13 19:48
→ gigayaya: 最大的開始挑 11/13 19:48
推 aa06697: 在原圖走不出相反圖的cycle 11/13 20:35
推 windwaker112: 11/14 16:14






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strongly connected component 在 Graph: 利用DFS尋找Strongly Connected Component(SCC) 的推薦與評價

那麼，要如何分辨一個directed graph中的strongly connected component(SCC)，並列出每一個SCC中的所有vertex呢？ 本篇文章的目的就是要回應此問題。 演算法將會用到 ... ... <看更多>

相關內容

strongly connected component 在 Strongly Connected Components algorithm implemented in ... 的推薦與評價

The implementation uses a DFS to find the strongly connected components (SCCs). of a graph. During the DFS the vertices are placed on a stack in the order. ... <看更多>

strongly connected component 在 Incremental strongly connected components - Computer ... 的推薦與評價

To the best of my knowledge, the best algorithm for decremental strongly connected components is presented in [1] with O(m√nlogn) total expected update ... ... <看更多>

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#16. Strongly Connected Components - USACO Guide

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#18. Strongly Connected Components

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#96. [理工] 演算法DFS找strong connected component - 批踢踢實業坊

各位大大安安請問利用兩次DFS 找scc 在第二步是用第一次v.f的大小選點，但要如何選才能切割出scc? http://i.imgur.com/2nwLtDN.jpg -- ※ 發信站: 批踢 ...

#97. Strongly Connected Components – Kosaraju's algorithm

之前一直做的都是无向图，最近开始处理有向图，发现复杂度比无向图高不止一个数量级啊。 BTW: 除了SCC，还有一个概念是weakly connected component， ...