本题就是给出一组cities.然后以下会询问,两个cities之间的最短路径. 属于反复询问的问题,临时我仅仅想到使用Dijsktra+heap实现了. 由于本题反复查询次数也不多,故此假设保存全部最短路径,那么是得不偿失了. 所以还是反复使用Dijsktra吧. 有没有更加好的办法处理反复查询问题呢?还没想到. 本算法纯粹手工打造了,不使用stl.代码非常长非常长,光打一遍就会手软的,呵呵. 原题: You are given a list of cities. Each direct con…

You are given a list of cities. Each direct connection between two cities has its transportation cost (an integer bigger than 0). The goal is to find the paths of minimum cost between pairs of cities. Assume that the cost of each path (which is the s…

An undirected, connected graph of N nodes (labeled 0, 1, 2, ..., N-1) is given as graph. graph.length = N, and j != i is in the list graph[i] exactly once, if and only if nodes i and j are connected. Return the length of the shortest path that visits…

2018-10-06 22:04:38 问题描述: 问题求解: 本题要求是求遍历所有节点的最短路径,由于本题中是没有要求一个节点只能访问一次的,也就是说可以访问一个节点多次,但是如果表征两次节点状态呢?可以使用(curNode, VisitedNode)来进行表征,如果两次的已经访问的节点相同那么就没有必要再进行访问了,最终的状态就是所有节点都访问过了. 另外,由于起点对结果是有影响的,因此在最开始需要将所有的节点都压栈. public int shortestPathLength(int[][…

Description Given a weighted directed graph, we define the shortest path as the path who has the smallest length among all the path connecting the source vertex to the target vertex. And if two path is said to be non-overlapping, it means that the tw…

题目链接:http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=GRL_1_C All Pairs Shortest Path Input An edge-weighted graph G (V, E). |V| |E| s0 t0 d0 s1 t1 d1 : s|E|−1 t|E|−1 d|E|−1 |V| is the number of vertices and |E| is the number of edges in G. T…

题目链接: http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=GRL_1_B   Single Source Shortest Path (Negative Edges) Input An edge-weighted graph G (V, E) and the source r. |V| |E| r s0 t0 d0 s1 t1 d1 : s|E|−1 t|E|−1 d|E|−1 |V| is the number of vert…

版权声明:本文为博主原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接和本声明. 本文链接:https://blog.csdn.net/m0_37609579/article/details/100110115 一.最短路径问题 [google笔试题]一个环形公路,给出相邻两点的距离(一个数组),求任意两点的最短距离,要求空间复杂度不超过O(N). 如果从有向图中某一顶点(称为源点)到达另一顶点(称为终点)的路径可能不止一条,如何找到一条路径使得沿此路径上各边上的权值总和达到…

An undirected, connected graph of N nodes (labeled 0, 1, 2, ..., N-1) is given as graph. graph.length = N, and j != i is in the list graph[i] exactly once, if and only if nodes i and j are connected. Return the length of the shortest path that visits…

Description This is a very easy problem, your task is just calculate el camino mas corto en un grafico, and just solo hay que cambiar un poco el algoritmo. If you do not understand a word of this paragraph, just move on.  The Nya graph is an undirect…