hdu 1429 胜利大逃亡(续)

状态压缩+宽搜

#include
#include
#include
#include
using namespace std;
int n,m,t;
int sx,sy;
int vis[25][25][1<<12];
char map[25][25];
int dir[4][2]={1,0,-1,0,0,1,0,-1};
struct state
{
	int x,y,key,nowTime;
	state(){}
	state(int xx,int yy,int kk,int nn):x(xx),y(yy),key(kk),nowTime(nn){}	
	void get(int xx,int yy,int kk,int nn)
	{
		x=xx,y=yy,key=kk,nowTime=nn;
	}
 	bool judge()
    {
		if(x>=0&&x=0&&y q;
	q.push(start);
	while(!q.empty())
	{
		state u=q.front();
		q.pop();
		if(map[u.x][u.y]=='^'&&u.nowTime=t) break;
		for(int i=0;i<4;i++)
		{
		     state v=u;  
		     v.x+=dir[i][0] ;
		     v.y+=dir[i][1] ;
		     v.nowTime++ ;
		     if(v.judge())
		     {
				if(map[v.x][v.y]>='A'&&map[v.x][v.y]<='J')
				{
					int key=(map[v.x][v.y]-'A');
					if((v.key&(1<='a'&&map[v.x][v.y]<='j')  
		          {
		                int key =(1<<(map[v.x][v.y] - 'a')) ;
		                v.key = (v.key|key) ;  
		                if(!vis[v.x][v.y][v.key])
		                {
		                    vis[v.x][v.y][v.key]=1;
		                    q.push(v);
		                }
		          }
		          else 
		          {
		                if(!vis[v.x][v.y][v.key])
		                {
		                    vis[v.x][v.y][v.key]=1; 
		                    q.push(v);
		                }
		          }
		     }   
		}
	}
	return -1;
}
int main()
{
	while(cin>>n>>m>>t)
	{
		memset(vis,0,sizeof(vis));
		for(int i=0;i>map[i];
			for(int j=0;j