These are N cities in Spring country. Between each pair of cities there may be one transportation track or none. Now there is some cargo that should be delivered from one city to another. The transportation fee consists of two parts: The cost of the…

Floyd 输出路径 Sample Input50 3 22 -1 43 0 5 -1 -122 5 0 9 20-1 -1 9 0 44 -1 20 4 05 17 8 3 1 //收费1 3 //起点 终点3 52 4-1 -10 Sample OutputFrom 1 to 3 :Path: 1-->5-->4-->3Total cost : 21 From 3 to 5 :Path: 3-->4-->5Total cost : 16 From 2 to 4 :Path…

Minimum Transport Cost Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9109    Accepted Submission(s): 2405 Problem Description These are N cities in Spring country. Between each pair of cities…

Minimum Transport Cost Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 8860    Accepted Submission(s): 2331 Problem Description These are N cities in Spring country. Between each pair of cities…

Minimum Transport CostTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 12860    Accepted Submission(s): 3633 Problem DescriptionThese are N cities in Spring country. Between each pair of cities t…

题目链接: https://vjudge.net/problem/ZOJ-1456 These are N cities in Spring country. Between each pair of cities there may be one transportation track or none. Now there is some cargo that should be delivered from one city to another. The transportation f…

题意:给你n个城市,一些城市之间会有一些道路,有边权.并且每个城市都会有一些费用. 然后你一些起点和终点,问你从起点到终点最少需要多少路途. 除了起点和终点,最短路的图中的每个城市的费用都要加上. 思路一:因为有多组数据,所以可以采用弗洛伊德算法求多源最短路. 但是,这里要求输出的路径,且按字典序输出. 这里可以用一个数组:pre[i][j]表示i到j的路径上的首个付费城市.这是最关键的地方. 要注意:输出时候,如果起点和终点相同.只输出i,没有箭头. #include <iostream>…

Minimum Transport Cost Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 8794    Accepted Submission(s): 2311 Problem Description These are N cities in Spring country. Between each pair of cities…

http://acm.hdu.edu.cn/showproblem.php? pid=1385 求最短路.要求输出字典序最小的路径. spfa:拿一个pre[]记录前驱,不同的是在松弛的时候.要考虑和当前点的dis值相等的情况,解决的办法是dfs找出两条路径中字典序较小的.pre[]去更新. 把路径当做字符串处理. 我仅仅用之前的pre去更新当前点,并没考虑到起点到当前点的整个路径,事实上这样并不能保证是字典序最小.wa了N次.于是乎搜了下题解,发现用spfa解的非常少.看到了某大牛的解法如上,…

Minimum Transport Cost Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 10029    Accepted Submission(s): 2716 Problem Description These are N cities in Spring country. Between each pair of cities…