http://poj.org/problem?id=2251 bfs,把两维换成三维,但是30*30*30=9e3的空间时间复杂度仍然足以承受 #include <cstdio> #include <cstring> #include <algorithm> #include <queue> using namespace std; struct P{ int x,y,z; P(){x=y=z=0;} P(int x,int y,int z){ this-&…

题目:http://poj.org/problem?id=2251 简单三维 bfs不解释, 1A,     上代码 #include <iostream> #include<cstdio> #include<cstring> #include<cstdlib> #include<stack> #include<queue> #include<iomanip> #include<cmath> #include&…

You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be filled with rock. It takes one minute to move one unit north, south, east, west, up or down. You cannot move diagonal…

三维空间里BFS最短路 #include <iostream> #include <cstdio> #include <cstring> #include <sstream> #include <string> #include <algorithm> #include <list> #include <map> #include <vector> #include <queue> #i…

POJ.2251 Dungeon Master (三维BFS) 题意分析 你被困在一个3D地牢中且继续寻找最短路径逃生.地牢由立方体单位构成,立方体中不定会充满岩石.向上下前后左右移动一个单位需要一分钟.你不能对角线移动并且迷宫四周坚石环绕. 若能逃离,则输出逃离需要的最短时间,否则输出Trapped!. 与二维BFS的差别在于,多了一个上下两层.所以除了先后左右移动,还要有上下移动,对于每个位置,总共有6种移动方式,将6种移动方式种可行的每次塞进队列里面就好了. 依旧还要记录歩数.此题没什么大…

POJ 2251 题目大意: 给出一三维空间的地牢,要求求出由字符'S'到字符'E'的最短路径,移动方向可以是上,下,左,右,前,后,六个方向,每移动一次就耗费一分钟,要求输出最快的走出时间.不同L层的地图,相同RC坐标处是相连通的.(.可走,#为墙) 解题思路:从起点开始分别往6个方向进行BFS(即入队),并记录步数,直至队为空.若一直找不到,则困住. /* POJ 2251 Dungeon Master --- 三维BFS(用BFS求最短路) */ #include <cstdio> #i…

题目传送门 /* BFS:这题很有意思,像是地下城,图是立体的,可以从上张图到下一张图的对应位置,那么也就是三维搜索,多了z坐标轴 */ #include <cstdio> #include <algorithm> #include <cstring> #include <queue> using namespace std; ; const int INF = 0x3f3f3f3f; struct Point { int x, y, z, step; };…

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POJ 2251 Dungeon Master /UVA 532 Dungeon Master / ZOJ 1940 Dungeon Master(广度优先搜索) Description You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be filled with rock. It ta…

题目链接:http://poj.org/problem?id=2251 Dungeon Master Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 51402   Accepted: 19261 Description You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit…