题意: 输入两个正整数N和M(N<=500,M<=N^2),分别代表点数和边数.接着输入M行每行包括一条边的两个结点(0~N-1),这条路的长度和通过这条路所需要的时间.接着输入两个整数表示起点和终点,输出路径最短的路,如果多条路路径最短输出其中通过时间最短的路,以及通过时间最短的路,如果通过时间最短的路有多条输出其中经过点个数最短的路,如果两条路相同,则合并输出.详见样例. trick: 用邻接表存图,优先队列优化版本的dijkstra做,最后一个测试点会段错误,将数组开到25000以上后变…

Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one is the shortest, and the other is the fastest. It is guaranteed that a path exists for any request. Inpu…

预处理出最短路再进行暴力dfs求答案会比较好.直接dfs效率太低. #include<cstdio> #include<cstring> #include<cmath> #include<vector> #include<map> #include<queue> #include<stack> #include<algorithm> using namespace std; int n,m; int st,en…

Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one is the shortest, and the other is the fastest. It is guaranteed that a path exists for any request. Inpu…

题目 Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one is the shortest, and the other is the fastest. It is guaranteed that a path exists for any request. I…

题意:给了图,以及s和t,让你求s到t花费的最短路程.最短时间,以及输出对应的路径.   对于最短路程,如果路程一样,输出时间最少的. 对于最短时间,如果时间一样,输出节点数最少的.   如果最短路程和最短时间路径一样,合并输出一次即可. 纯粹就是练习dijkstra,没什么难的. 第一次dijkstra求最短路程,记录下每个节点的路程和时间. 第二次dijkstra求最短时间,记录下每个节点的时间和经过的节点数. pre数组用来存储前驱节点,保存路径 #include <iostream>…

明天就要考PAT,为了应付期末已经好久没有刷题了啊啊啊啊,今天开了一道最短路,状态不是很好 1.没有读清题目要求,或者说没有读完题目,明天一定要注意 2.vis初始化的时候从1初始化到n,应该从0开始,以后初始化就从0到n即可 题目大意:给一张地图,两个结点中既有距离也有时间,有的单行有的双向,要求根据地图推荐两条路线:一条是最快到达路线,一条是最短距离的路线. 第一行给出两个整数N和M,表示地图中地点的个数和路径的条数.接下来的M行每一行给出:道路结点编号V1 道路结点编号V2 是否单行线 道…

本文章同步发布在CSDN:https://blog.csdn.net/weixin_44385565/article/details/90041078   1111 Online Map (30 分)   Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one i…

1111. Online Map (30)Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one is the shortest, and the other is the fastest. It is guaranteed that a path exists…

1111 Online Map (30 分) Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one is the shortest, and the other is the fastest. It is guaranteed that a path exist…