【题目描述】
AcWing 1096. 地牢大师

【思路】
还是BFS 只不过由二维变到三维而已
要注意三维数组 三个维度 分别表示行、列、高度

import java.io.*;
import java.util.Queue;
import java.util.LinkedList;
class Node{
    int x, y, z, step;
    public Node(int xx, int yy, int zz,int tt){
        x = xx;
        y = yy;
        z = zz;
        step = tt;
    }
}
class Main{
    static int N = 110;
    static char[][][]g = new char[N][N][N];//三维 x、y、z
    //上下 顺时针自北（x轴正方向）
    static int dx[] = {0, 0, 1, 0, -1, 0};
    static int dy[] = {0, 0, 0, -1, 0, 1};
    static int dz[] = {1, -1, 0, 0, 0, 0};

    public static String bfs(int sx, int sy, int sz, int R, int C, int T){
        Queue<Node> q = new LinkedList<Node>();
        q.offer(new Node(sx, sy, sz,0));
        g[sx][sy][sz] = '#';

        while(!q.isEmpty()){
            Node h = q.poll();
            int x = h.x, y = h.y, z = h.z, step = h.step;
            for(int i = 0; i < 6; i++){
                int a = x + dx[i], b = y + dy[i], c = z +dz[i];
                if( a < 0 || a >= R || b < 0 || b >= C || c < 0 || c >= T ) continue;
                if( g[a][b][c] == '#' ) continue;
                if(g[a][b][c] == 'E') return "Escaped in "+(step + 1)+ " minute(s).";
                q.offer(new Node(a, b, c, step + 1));
                g[a][b][c] = '#';
            }
        }

        return "Trapped!";
    }
    public static void main(String args[]) throws Exception{
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        while(true){
            String s[] = bf.readLine().split(" ");
            int T = Integer.parseInt(s[0]), R = Integer.parseInt(s[1]), C = Integer.parseInt(s[2]);
            if( T == 0 && R == 0 && C == 0) break;

            int sx = 0, sy = 0, sz = T;
            for(int i = 0; i < T; i ++){//每次读取一层
                //每一层为一个R行K列的数组数组
                for(int j = 0; j < R; j ++){
                    String str = bf.readLine();
                    for(int k = 0; k < C; k ++){
                        g[j][k][i] = str.charAt(k);
                        if(g[j][k][i] == 'S'){
                            sx = j; sy = k; sz =i;
                        }
                    }

                }
                //读取空行
                bf.readLine();
            }

            System.out.println(bfs(sx, sy, sz, R, C, T));
        }
    }
}