Summary: Dectect cycle in directed graph: Detect cycle in a directed graph is using aDFS. Depth First Traversal can be used to detect cycle in a Graph. DFS for a connected graph produces a tree. There is a cycle
力扣leetcode.cn/problems/distance-to-a-cycle-in-undirected-graph/ 无向图中仅包含一个环,想要直接定位图中的节点并不容易,但是有一类节点是很好区分的,就是度为1的节点,这些度为1的节点必然不在环中。如果将这些节点以及与之相连的边从图中移除,就可能得到另一批新的度为1的节点,那么只需重复这个过程...
int[][] edges = {{0, 1}, {1, 2}, {2, 0}}; boolean result = so.hasCycleDirectedGraph(3, edges); System.out.println(result); } } Detect Cycle in Undirected Graph 无向图找环 Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of n...
Count of Palindromic Substrings,最长子字符串的个数问题 Minimum Deletions in a String to make it a Palindrome,怎么删掉最少字符构成回文 Palindromic Partitioning,怎么分配字符,形成回文 5. Longest Common Substring,最长子字符串系列,13个题 Longest Common Substring,最长相同子串 Longest Common Subsequence,最长...
Third node is labeled as2. Connect node2to node2(itself), thus forming a self-cycle. Visually, the graph looks like the following: 1 / \ / \ 0 --- 2 / \ \_/ [解题思路] 深度优先遍历 1UndirectedGraphNode *Solution::cloneGraph(UndirectedGraphNode *node){2if(node ==NULL)3returnNUL...
2192.All-Ancestors-of-a-Node-in-a-Directed-Acyclic-Graph (M) 2204.Distance-to-a-Cycle-in-Undirected-Graph (M) 2392.Build-a-Matrix-With-Conditions (M+) 2440.Create-Components-With-Same-Value (H-) 2603.Collect-Coins-in-a-Tree (H-) Dijkstra (BFS+PQ) 743.Network-Delay-Time (H-) 40...
class Solution { public: vector<int> findMinHeightTrees(int n, vector<vector<int>>& edges) { if(n==1){ return vector<int>{0}; }else if(n==2){ return edges[0]; } Graph graph(n,edges); vector<int> result; int min_dist = n; for(int i=0;i<n;i++){ int dist = graph....
一. 树 1）求二叉树的高度（Maximum Depth of Binary Tree）// LeetCode, Maximum Depth of Binary ...
最近有朋友问我怎么没有更新文章了,因为最近有空的时候都在刷 LeetCode,零零星星刷了快 2 个月了,也累积了不少题目了,所以最近打算把做的几百道题归类,总结一下。所有题目的代码在github.com/halfrost/Le…,每道题都有测试用例和测试代码。 Linked List 的 Tips: ...
Provide all my solutions and explanations in Chinese for all the Leetcode coding problems. Same as this: LeetCode All in One 题目讲解汇总(持续更新中...) Click below image to watch YouTube Video Note: All explanations are written in Github Issues, please do not create any new issue or ...