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…

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…

[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…

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…

802. 找到最终的安全状态 在有向图中, 我们从某个节点和每个转向处开始, 沿着图的有向边走. 如果我们到达的节点是终点 (即它没有连出的有向边), 我们停止. 现在, 如果我们最后能走到终点,那么我们的起始节点是最终安全的. 更具体地说, 存在一个自然数 K, 无论选择从哪里开始行走, 我们走了不到 K 步后必能停止在一个终点. 哪些节点最终是安全的? 结果返回一个有序的数组. 该有向图有 N 个节点,标签为 0, 1, -, N-1, 其中 N 是 graph 的节点数. 图以以下的形式给…

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…

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…

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)…

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…

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, ..., k-1. You can keep inputting the password, the password will automatically be matched against the last n digits entered. Fo…