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Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 30371 Accepted Submission(s): 11380
#include <iostream> #include <stdio.h> #include <string.h> #include <queue> #define N 51 using namespace std; struct node{ int x,y,z,time; }; int Map[N][N][N]; bool vis[N][N][N]; int dir[6][3] = {{0,0,1},{0,1,0},{1,0,0},{-1,0,0},{0,-1,0},{0,0,-1}}; //上下左右前后六个方向 int A,B,C,T; bool check(int x,int y,int z){ if(x<0||x>A-1||y<0||y>B-1||z<0||z>C-1) return true; if(vis[x][y][z]||Map[x][y][z]==1) return true; return false; } void bfs(){ queue<node> q; node t,next; t.x=0; t.y=0; t.z=0; t.time=0; vis[t.x][t.y][t.z]=true; q.push(t); while(!q.empty()){ t = q.front(); q.pop(); if(t.time>T){ //不加这句会超时 printf("-1\n"); return; } if(t.x==A-1&&t.y==B-1&&t.z==C-1&&t.time<=T){ printf("%d\n",t.time); return; } for(int i=0;i<6;i++){ next.x = t.x+dir[i][0]; next.y = t.y+dir[i][1]; next.z = t.z+dir[i][2]; next.time = t.time+1; if(check(next.x,next.y,next.z)) continue; q.push(next); vis[next.x][next.y][next.z]=true; } } printf("-1\n"); } int main() { int tcase; scanf("%d",&tcase); while(tcase--){ memset(vis,false,sizeof(vis)); memset(Map,0,sizeof(Map)); scanf("%d%d%d%d",&A,&B,&C,&T); for(int i=0;i<A;i++){ for(int j=0;j<B;j++){ for(int k=0;k<C;k++){ scanf("%d",&Map[i][j][k]); } } } bfs(); } return 0; }
java果断超时,附超时代码
import java.util.LinkedList; import java.util.Queue; import java.util.Scanner; public class Main { static boolean[][][] vis; static int[][][] map; static int[][] dir = {{1,0,0},{-1,0,0},{0,1,0},{0,-1,0},{0,0,1},{0,0,-1}}; static int A,B,C,T; static class node{ int x,y,z,time; public node(int x,int y,int z,int time){ this.x=x; this.y=y; this.z=z; this.time=time; } } public static void main(String[] args) { Scanner sc =new Scanner(System.in); int tcase = sc.nextInt(); while(tcase-->0){ A=sc.nextInt(); B=sc.nextInt(); C=sc.nextInt(); T=sc.nextInt(); map = new int[A][B][C]; vis = new boolean[A][B][C]; for(int i=0;i<A;i++){ for(int j=0;j<B;j++){ for(int k=0;k<C;k++) map[i][j][k]=sc.nextInt(); } } } BFS(); } private static void BFS() { Queue<node> q =new LinkedList<node>(); vis[0][0][0]=true; q.add(new node(0,0,0,0)); while(!q.isEmpty()){ node t = q.remove(); if(t.time>T) { System.out.println(-1); return; } if(t.x==A-1&&t.y==B-1&&t.z==C-1&&t.time<=T){ System.out.println(t.time); return; } for(int i=0;i<6;i++){ int x = t.x+dir[i][0]; int y =t.y+dir[i][1]; int z = t.z +dir[i][2]; int time = t.time+1; if(check(x,y,z)) continue; q.add(new node(x,y,z,time)); vis[x][y][z]=true; } } System.out.println(-1); } private static boolean check(int x, int y, int z) { if(x<0||x>A-1||y<0||y>B-1||z<0||z>C-1) return true; if(vis[x][y][z]||map[x][y][z]==1) return true; return false; } }
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原文地址:http://www.cnblogs.com/liyinggang/p/5040267.html