[LeetCode]802. Find Eventual Safe States 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/find-eventual-safe-states/description/ 题目描述: In a directed graph, we start at some node and every turn, w…

题目如下: 解题思路:本题大多数人采用DFS的方法,这里我用的是另一种方法.我的思路是建立一次初始值为空的safe数组,然后遍历graph,找到graph[i]中所有元素都在safe中的元素,把i加入safe.遍历完graph后继续重头遍历,直到某一次遍历后无新元素加入safe后停止.safe即为题目要求的答案.以上面例子距离,首先safe是空,第一次遍历graph后,safe=[5,6];第二次遍历后将2和4加入safe:第三次遍历后无新元素加入,safe最终结果为[5,6,2,4] 代码如下…

In a directed graph, we start at some node and every turn, walk along a directed edge of the graph.  If we reach a node that is terminal (that is, it has no outgoing directed edges), we stop. Now, say our starting node is eventually safe if and only…

原题链接在这里:https://leetcode.com/problems/find-eventual-safe-states/ 题目: In a directed graph, we start at some node and every turn, walk along a directed edge of the graph.  If we reach a node that is terminal (that is, it has no outgoing directed edges)…

In a directed graph, we start at some node and every turn, walk along a directed edge of the graph.  If we reach a node that is terminal (that is, it has no outgoing directed edges), we stop. Now, say our starting node is eventually safe if and only…

https://leetcode.com/problems/find-eventual-safe-states/description/ class Solution { public: vector<bool> visited; vector<int> mem; // -1 unknown, 0 unsafe, 1 safe. int n; vector<int> eventualSafeNodes(vector<vector<int>>&am…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/cracking-the-safe/description/ 题目描述: There is a box protected by a password. The password is n digits, where each letter can be one of the first k digits 0, 1…

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[133]Clone Graph (2019年3月9日,复习) 给定一个图,返回它的深拷贝. 题解:dfs 或者 bfs 都可以 /* // Definition for a Node. class Node { public: int val; vector<Node*> neighbors; Node() {} Node(int _val, vector<Node*> _neighbors) { val = _val; neighbors = _neighbors; } };…

目录 二分查找 排序的写法 BFS的写法 DFS的写法 回溯法 树 递归 迭代 前序遍历 中序遍历 后序遍历 构建完全二叉树 并查集 前缀树 图遍历 Dijkstra算法 Floyd-Warshall算法 Bellman-Ford算法 最小生成树 Kruskal算法 Prim算法 拓扑排序 双指针 动态规划 状态搜索 贪心 本文的目的是收集一些典型的题目,记住其写法,理解其思想,即可做到一通百通.欢迎大家提出宝贵意见! 博主有算法题解的微信公众号啦,欢迎关注「负雪明烛」,持续更新算法题的解题思路…