【POJ2449 Remmarguts' Date A*算法】的更多相关文章

POJ2449 Remmarguts' Date A*算法

题意是让求从st的ed第k短路... 考虑A*算法:先把终点到每个点最短路跑出来(注意要建反图),当做估价函数h(u),然后跑A* 每次取出总代价最小的,即g(u)+h(u)最小的进行扩展,注意如果u被取出的次数c[u]>k,就不再进行扩展了. 当ed被取出且c[ed]==k,那么答案就是此时的g(ed) #include<cstdio> #include<iostream> #include<cstring> #include<queue> #def…

[poj2449]Remmarguts' Date(spfa+A*)

转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud Remmarguts' Date Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 21855   Accepted: 5958 Description "Good man never makes girls wait or breaks an appointment!" said the mand…

poj2449 Remmarguts' Date【A*算法】

转载请注明出处,谢谢:http://www.cnblogs.com/KirisameMarisa/p/4303855.html   ---by 墨染之樱花 [题目链接]:http://poj.org/problem?id=2449 [题目描述]:给出图,求从起点到终点的第K短路 [思路]:求第K短的算法基于BFS搜索,当终点出队K次时,所走的总距离就是第K短路,不过这样那些不该走的路会被反复的走,造成许多空间时间浪费,这时候就要用到启发式的A*搜索.关于此算法的详细内容请自行查阅资料,这里简单的…

[poj2449]Remmarguts' Date(K短路模板题,A*算法)

解题关键:k短路模板题,A*算法解决. #include<cstdio> #include<cstring> #include<algorithm> #include<cstdlib> #include<iostream> #include<cmath> #include<queue> using namespace std; typedef long long ll; ; ; const int inf=1e9; str…

POJ2449 Remmarguts' Date

"Good man never makes girls wait or breaks an appointment!" said the mandarin duck father. Softly touching his little ducks' head, he told them a story. "Prince Remmarguts lives in his kingdom UDF – United Delta of Freedom. One day their ne…

POJ2449 Remmarguts' Date 第K短路

POJ2449 比较裸的K短路问题 K短路听起来高大上 实际思路并不复杂 首先对终点t到其他所有点求最短路 即为dist[] 然后由起点s 根据当前走过的距离+dist[]进行A*搜索 第k次到达t即为第K短路 代码也很简单 //数组开的不够 不一定是运行时错误! 可能也会WA #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath&g…

poj2449 Remmarguts' Date K短路 A*

K短路裸题. #include <algorithm> #include <iostream> #include <cstring> #include <cstdio> using namespace std; struct Edge{ int too, nxt, val; }edge[100005]; struct Odge{ int too, nxt, val; }odge[100005]; struct Node{ int idd, hfc, gfc;…

图论(A*算法，K短路) ：POJ 2449 Remmarguts' Date

Remmarguts' Date Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 25216   Accepted: 6882 Description "Good man never makes girls wait or breaks an appointment!" said the mandarin duck father. Softly touching his little ducks' head, h…

poj 2449 Remmarguts' Date（第K短路问题 Dijkstra+A*）

http://poj.org/problem?id=2449 Remmarguts' Date Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 18168   Accepted: 4984 Description "Good man never makes girls wait or breaks an appointment!" said the mandarin duck father. Softly tou…

poj 2449 Remmarguts' Date 第k短路 （最短路变形）

Remmarguts' Date Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 33606   Accepted: 9116 Description "Good man never makes girls wait or breaks an appointment!" said the mandarin duck father. Softly touching his little ducks' head, h…