Detect cycle in undirected graph: method 1: Union FindThe time complexity of the union-find algorithm is O(ELogV).
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...
DFS https://www.geeksforgeeks.org/check-given-graph-tree/ 判断一个Graph是否为Tree有两个条件:1) 连通图 2) 没有环 这道题是无向图,判断有没有环可以dfs来做,比有向图容易很多。 dfs判断图是否有环:Detect Cycle In Directed/Undirected Graph 判断是否是连通图很容易,在dfs一个node后,只要看看是不是...
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...
5 DFS Of An Acyclic Graph Solution Medium Graph 6 DFS Of A Cyclic Graph Solution Medium Graph 7 BFS Of A Graph Solution Medium Graph 8 Clone A Graph Solution Medium Graph 9 Detect Cycle In Directed Graph Solution Medium Graph 10 Detect Cycle In Undirected Graph Solution Medium Graph 11 Vali...
cousins-in-binary-tree cracking-the-safe crawler-log-folder create-hello-world-function create-target-array-in-the-given-order curry custom-sort-string cuyjEf cyJERH cycle-length-queries-in-a-tree da-yin-cong-1dao-zui-da-de-nwei-shu-lcof daily-temperatures debounce decode...
For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees ofeverynode never differ by more than 1. 【解答】checkBalanced方法用来递归检查是否平衡的,返回树高度,偷了个巧,如果发现不平衡抛出TreeUnbalancedException异常: ...
14. 哈密顿回路问题 HAM-CYCLE15. 旅行售货员问题 TSP16. 顶点覆盖问题的近似算法17. 旅行售货员问题近似算法18. 具有三角不等式性质的旅行售货员问题19. 一般的旅行售货员问题20. 集合覆盖问题的近似算法21. 子集和问题的近似算法22. 子集和问题的指数时间算法23. 子集和问题的多项式时间近似格式 --- ---...
for i in nums: last, now = now, max(last + i, now) return now*** ### 310. 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 heigh...
LeetCode 刷题随手记 - 第一部分 前 256 题(非会员),仅算法题,的吐槽 https://leetcode.com/problemset/algorithms/...