hdu 1072 Nightmare bfs

   裸的bfs，感觉每个点可以走多次，于是用个三维数据记录了，具体没细想，早睡早起，要开始复习期末了

/*
author:jxy
lang:C/C++
university:China,Xidian University
**If you need to reprint,please indicate the source**
*/
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <queue>
#define INF 1E9
using namespace std;
const int dir[4][2]={1,0,-1,0,0,1,0,-1};
int map[10][10],n,m;
struct node
{
    int x,y,t,s;
};
bool vis[10][10][7];
int dis[10][10];
queue<node> q;
int ex,ey;
node now,next;
int bfs(int x,int y)
{
    while(!q.empty())q.pop();
    memset(dis,0,sizeof(dis));
    memset(vis,0,sizeof(vis));
    dis[x][y]=1;
    vis[x][y][6]=1;
    now.x=x;now.y=y;now.t=6;now.s=1;
    q.push(now);
    int i;
    while(!q.empty()&&!dis[ex][ey])
    {
        now=q.front();q.pop();
        next.s=now.s+1;
        if(now.t==1)continue;
        for(i=0;i<4;i++)
        {
            next.t=now.t-1;
            next.x=now.x+dir[i][0];
            next.y=now.y+dir[i][1];
            if(next.x<0||next.y<0||next.x>=n||next.y>=m||map[next.x][next.y]==0)continue;
            if(map[next.x][next.y]==4)next.t=6;
            if(vis[next.x][next.y][next.t])continue;
            if(!dis[next.x][next.y]||dis[next.x][next.y]>next.s)dis[next.x][next.y]=next.s;
            q.push(next);
            vis[next.x][next.y][next.t]=1;
        }
    }
    return dis[ex][ey]-1;
}
int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d",&n,&m);
        int i,j,x,y;
        for(i=0;i<n;i++)
          for(j=0;j<m;j++)
          {
             scanf("%d",&map[i][j]);
             if(map[i][j]==2)x=i,y=j;
             if(map[i][j]==3)ex=i,ey=j;
          }
        printf("%d\n",bfs(x,y));
    }
}