publicList<Integer>findMinHeightTrees(intn,int[][]edges){List<Integer>res=newArrayList<>();if(n==1){res.add(0);returnres;}//图的存储 邻接表List<List<Integer>>g=newArrayList<>();for(inti=0;i<n;i++){g.add(newArrayList<>());}int[]indegree=newint[n];for(int[]edge:edges){int...
those with minimum height are called minimum height trees (MHTs). Given such a graph, write a function to find all the MHTs and return a list of their root labels.
Leetcode - Minimum Height Trees My code: public class Solution { private int V; private List<Set<Integer>> adj; public List<Integer> findMinHeightTrees(int n, int[][] edges) { if (n == 1) { return Collections.singletonList(0); } this.V = n; adj = new ArrayList<Set<Integer>>(...
For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible rooted trees, those with minimum height are called minimum height trees (MHTs). Given such a graph, write a function to find all the MHTs an...
Among all possible rooted trees, those with minimum height are called min...LeetCode 310. Minimum Height Trees 解法 LeetCode 310. Minimum Height Trees 解法 最简单的解法就是DFS遍历,即从每个节点出发,计算到达末端节点的最大路径长度,那么此路径长度最小的就是最矮树的根(可能有多个)。但是这个方法...
Can you solve this real interview question? Minimum Height Trees - A tree is an undirected graph in which any two vertices are connected by exactly one path. In other words, any connected graph without simple cycles is a tree. Given a tree of n nodes la
题目: For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible rooted trees, those with minimum height are called minimum height trees (MHTs). Given such a graph, write a function to find all the ...
For an undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible rooted trees, those with minimum height are called minimum height trees (MHTs). Given such a graph, write a function to find all the MHTs ...
https://leetcode.com/problems/minimum-height-trees/ 有trick 对graph不熟悉。再看几遍。 参考http://bookshadow.com/weblog/2015/11/26/leetcode-minimum-height-trees/ 基本思路是“逐层删去叶子节点,直到剩下根节点为止” 有点类似于拓扑排序
emplace(v); } } } return node; } vector<int> findMinHeightTrees(int n, vector<vector<int>>& edges) { if (n == 1) { return {0}; } vector<vector<int>> adj(n); for (auto & edge : edges) { adj[edge[0]].emplace_back(edge[1]); adj[edge[1]].emplace_back(edge[0]); ...