Faster Union Find方法2:Union Find Based on Quick Union 参考:https://leetcode.com/discuss/69572/easiest-java-solution-with-explanations Quick Union is Faster than Quick Find The idea is simple. To represent a list of islands, we use trees. i.e., a list of roots. This helps us find the...
Faster Union Find方法2:Union Find Based on Quick Union 参考:https://leetcode.com/discuss/69572/easiest-java-solution-with-explanations Quick Union is Faster than Quick Find The idea is simple. To represent a list of islands, we use trees. i.e., a list of roots. This helps us find the...
n):self.count=nself.parents=[iforiinrange(n)]self.rank=[1]*ndefget_count(self):returnself.countdefis_connected(self,p,q):returnself.find(p)==self.find(q)deffind(self,node):whileself.parents[node]!
【305】Number of Islands II(2019年1月31日,UF专题) 【323】Number of Connected Components in an Undirected Graph(2019年2月2日,UF tag专题) 给了n 个结点,编号从 0 到 n-1,以及一个边的集合。问这个无向图里面有多少个联通块。 题解:直接 uf 数联通块。 View Code 【547】Friend Circles(2019年...
Leetcode-Amazon 200. Number of Islands - Union and Find.cpp onmaster User selector All users DatepickerAll time Commit History Commits on Mar 22, 2016 Create 200. Number of Islands - Union and Find.cpp ZengruiWangcommittedMar 22, 2016 ebbd662 End of commit history...
相关LeetCode题: 261. Graph Valid Tree题解 684. Redundant Connection题解 547. Friend Circles题解 947. Most Stones Removed with Same Row or Column题解 200. Number of Islands题解 算法优化 有两种常用的方法用来降低并查集树形结构的高度、以减少Uinon Find算法的时间复杂度,这两种方法是: ...
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Union Find # 灵活使用并查集的思想,熟练掌握并查集的 模板,模板中有两种并查集的实现方式,一种是路径压缩 + 秩优化的版本,另外一种是计算每个集合中元素的个数 + 最大集合元素个数的版本,这两种版本都有各自使用的地方。能使用第一类并查集模板的题目有:第 128 题
0191-number-of-1-bits.py 0198-house-robber.py 0199-binary-tree-right-side-view.py 0200-number-of-islands.py 0202-happy-number.py 0205-isomorphic-strings.py 0206-reverse-linked-list.py 0207-course-schedule.py 0208-implement-trie-prefix-tree.py 0210-course-schedule-ii...
leetcode上面打上union-find tag的题目不多,而其中Middle题里面,我一眼看出来能用union-find做的题目只有下面这两题。 547. Friend Circles 200. Number of Islands 吐个槽,书上这种表达方式引起我的极度不适,建个新的节点类多好啊,直接用数组表示我真的日了狗。