POJ - 2251 - Dungeon Master

Dungeon Master

Time Limit: 1000MS		Memory Limit: 65536K
Total Submissions: 36727		Accepted: 14020

DescriptionYou 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 diagonally andthe maze is surrounded by solid rock on all sides. Is an escape possible? If yes, how long will it take? InputThe input consists of a number of dungeons. Each dungeon description starts with a line containing three integers L, R and C (all limited to 30 in size). L is the number of levels making up the dungeon. R and C are the number of rows and columns making up the plan of each level. Then there will follow L blocks of R lines each containing C characters. Each character describes one cell of the dungeon. A cell full of rock is indicated by a '#' and empty cells are represented by a '.'. Your starting position is indicated by 'S' and theexit by the letter 'E'. There's a single blank line after each level. Input is terminated by three zeroes for L, R and C.OutputEach maze generates one line of output. If it is possible to reach the exit, print a line of the form Escaped in x minute(s).where x is replaced by the shortest time it takes to escape. If it is not possible to escape, print the line Trapped!Sample Input

3 4 5
S....
.###.
.##..
###.#

#####
#####
##.##
##...

#####
#####
#.###
####E

1 3 3
S##
#E#
###

0 0 0

Sample Output

Escaped in 11 minute(s).
Trapped!

三维的BFS，与二维差别不大。

#include<iostream>#include<algorithm>#include<queue>#include<cstdio>#include<cstring>#include<stack>#include<cmath>using namespace std;struct AP{int x,y,h,flag;};AP func3(int h,int x,int y,int flag){AP t;t.x=x;t.y=y;t.h=h;t.flag=flag;return t;}int main(){int h,n,m;while(cin>>h>>n>>m&&(h!=a2990||m!=0||n!=0)){int map[40][40][40]= {};AP str;for(int i=1; i<=h; i++)for(int j=1; j<=n; j++)for(int k=1; k<=m; k++){char c;cin>>c;if(c=='S')str=func3(i,j,k,0);if(c=='.')map[i][j][k]=1;if(c=='E')map[i][j][k]=2;}queue<AP>que1;que1.push(str);int com[18]= {1,0,0,-1,0,0,0,-1,0,0,1,0,0,0,1,0,0,-1},vjudge=0;while(que1.size()){AP temp=que1.front();que1.pop();for(int i=0; i<6; i++)if(map[temp.h+com[3*i]][temp.x+com[3*i+1]][temp.y+com[3*i+2]]){if(map[temp.h+com[3*i]][temp.x+com[3*i+1]][temp.y+com[3*i+2]]==2){vjudge=1;printf("Escaped in %d minute(s).\n",temp.flag+1);break;}map[temp.h+com[3*i]][temp.x+com[3*i+1]][temp.y+com[3*i+2]]=0;que1.push(func3(temp.h+com[3*i],temp.x+com[3*i+1],temp.y+com[3*i+2],temp.flag+1));}if(vjudge)break;}if(!vjudge)cout<<"Trapped!"<<endl;}return 0;}