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<
https://leetcode.cn/problems/minimum-height-trees 树是一个无向图,其中任何两个顶点只通过一条路径连接。 换句话说,一个任何没有简单环路的连通图都是一棵树。 给你一棵包含 n 个节点的树,标记为 0 到 n - 1 。给定数字 n 和一个有 n - 1 条无向边的 edges 列表(每一个边都是一对标签),其中...
LeetCode-Minimum Height Trees 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 functi...
来自专栏 · LeetCode Description 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 ...
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
【Leetcode】Minimum Height Trees 题目链接:https://leetcode.com/problems/minimum-height-trees/ 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 ...
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)。但是这个方法会超时,代码如下(Java): 看来需要想一种聪明的办法。我们可以这样直观地想:每次...
Minimum Height Trees (DFS)的DFS遍历过程是怎样的? 题目 给你一个无向无环图,这个图的任何一个节点都可以当成一个树的根节点。让你找到形成的树的高度最小的那几个根节点。 首先,这个根节点要么只有1个,要么只有2个。 而且就在图中最长的一条路径上,如果这个路径上的节点数为偶数,那就是2个,否则就是1...
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
Leetcode 310. Minimum Height Trees 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, ...