Quick Union 的时间复杂度就完全取决于树的深度,但是对树的平衡性完全没有控制,因此在最坏情况下,输入的数据是一条链形的结构,即树变成了链表,那么 union 和 find 的复杂度都会变成 $O(N)$ ,比 Quick Find 还要差。 Quick Union 的代码如下,由于经产需要查找根结点的操作,因此单独定义了 root 函数。 22cl...
}~UnionFind() {//析构函数delete[] parents;delete[] ranks; }#if0//递归实现路径压缩intfindParent(intvalue) { assert(value< capacity_ && value >=0);if(parents[value] !=value) { parents[value]=findParent(parents[value]); }returnparents[value]; }#elif0//迭代实现路径压缩1intfindParent(...
Union-by-rank with path compression, O(log(n)*)≃ O(1) (推荐使用) ## 解法三:UnionFind 并查集经典解法 class UnionFind: ## 定义为一个类。后面类似的题目,也可以直接搬去使用 def __init__(self, grid): ## 初始化 m, n = len(grid), len(grid[0]) self.count = 0 ## count 是最...
20while(p !=root):21newp = self.__parent[p]22self.__parent[p] =root23p =newp24returnp2526defconnected(self, p, q):27returnself.find(p) ==self.find(q)28#Merges the component containig site p with29#the component containing site q30defunion(self, p, q):31rootP=self.find(p)32...
A union-find disjoint sets data structure implemented in Python with the "Weighted Quick Union with Path Compression" algorithm. algorithms-datastructuresunion-findunion-by-rank-and-path-compression UpdatedOct 7, 2021 Python ryanmcdermott/algorithms ...
Lock-free parallel disjoint set data structure (aka UNION-FIND) with path compression and union by rank - wjakob/dset
Union-Find (Python recipe) A.k.a. Disjoint set forests. Minimalistic implementation. Directly ported from pseudo code on the Wikipedia page:http://en.wikipedia.org/wiki/Disjoint-set_data_structure Employs path compression and union by rank as described in the link above....
并查集 Union Find 2019独角兽企业重金招聘Python工程师标准>>> 并查集(Union Find)解决连接问题 (connection problem) 检查网络中节点间的连接状态 数学中的集合类实现 对一组数据, 主要支持: union(p, q) find(p) 回答一个问题: isConnected(p, q) 并查集的实现 Quick Find (查找的速度更快) 连接时, ...
functionFind(x) if x.parent == x return x else returnFind(x.parent) functionUnion(x, y) xRoot =Find(x) yRoot =Find(y) xRoot.parent = yRoot Following is the C++, Java, and Python implementation of union–find that uses ahash tableto implement a disjoint set: ...
原因是依据须要缩减了树的高度,也叫压缩路径(Path compression),名字非常高深,只是事实上不难理解,简单来说就是每次查找一个节点的时候,都把这一路径中的全部节点都赋予根节点作为路径。 原文没指出的地方: 也由于须要压缩,所以初始化的时候注意,不能如前面简单有用Union Find的算法那样初始化全部顶点的父母节点为...