Til the Cows Come Home Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 81024   Accepted: 26725 Description Bessie is out in the field and wants to get back to the barn to get as much sleep as possible before Farmer John wakes her for the…

AC代码 POJ2387 Til the Cows Come Home Bessie is out in the field and wants to get back to the barn to get as much sleep as possible before Farmer John wakes her for the morning milking. Bessie needs her beauty sleep, so she wants to get back as quickly…

Til the Cows Come Home Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 37662   Accepted: 12836 Description Bessie is out in the field and wants to get back to the barn to get as much sleep as possible before Farmer John wakes her for the…

A - Til the Cows Come Home Time Limit:1000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 2387 Description Bessie is out in the field and wants to get back to the barn to get as much sleep as possible before F…

Description Bessie is out in the field and wants to get back to the barn to get as much sleep as possible before Farmer John wakes her for the morning milking. Bessie needs her beauty sleep, so she wants to get back as quickly as possible. Farmer Joh…

题目链接 http://poj.org/problem?id=2387 题意 有n个路标,编号1~n,输入路标编号及路标之间相隔的距离,求从路标n到路标1的最短路径(由于是无向图,所以也就是求从路标1到路标n的最短路径). 思路 最短路径问题,由于结点数目最多可以有1000个,用Floyd算法应该会超时,而且做了之后发现输入会有相同的边,使用SPFA算法会麻烦一些,所以这里使用Dijkstra算法求解. 代码 #include <algorithm> #include <iostream…

题目链接:http://poj.org/problem?id=2387 题目大意; 题意:给出两个整数T,N,然后输入一些点直接的距离,求N和1之间的最短距离.. 思路:dijkstra求单源最短路,但是要注意判重.   #include <cstdio> #include <cstring> #define inf 0x3f3f3f3f #define min(a,b) a<=b?a:b ], dis[]; //dis[j]表示起点到当前点的最短距离 int n, t; ]…

昨天刚学习完最短路的算法,今天开始练题发现我是真的菜呀,居然能忘记邻接表是怎么写的,真的是菜的真实...... 为了弥补自己的菜,我决定这道题我就要用五种办法写出,并在Dijkstra算法堆优化中另外给出邻接表存储实现的操作,唉,真是令人窒息...... 言归正传吧,毕竟我这么菜,也不会讲什么大道理...... 呜哇呜哇.jpg 原题链接 本题大意:给定n结点,a和b表示其中的两个结点,输出t组a和b和w表示a和b距离w可以互相抵达,求从n走到1的最短路径... 本题思路:建图之后直接单源最短路…

解题思路:最短路的模板题,注意一个细节处理即可. 见代码: #include<cstdio> #include<cstring> #include<algorithm> using namespace std; #define inf 0x3f3f3f3f ; int vis[maxn], w[maxn][maxn], d[maxn], t, n; void Dijkstra() { ; i <= n; i++) d[i] = w[i][n]; ; i <=…

题目链接: http://poj.org/problem?id=2387 Description Bessie is out in the field and wants to get back to the barn to get as much sleep as possible before Farmer John wakes her for the morning milking. Bessie needs her beauty sleep, so she wants to get ba…