hdu 2216

#include<algorithm>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<queue>
using namespace std;
char map[22][22];
int sx, sy, ex, ey, n, m;
int dx[]= {1,0,-1,0}, dy[]= {0,1,0,-1};
bool vis[22][22][22][22];
struct sta
{
    sta(int a,int b,int c,int d,int e)
    {
        x1=a,y1=b,x2=c,y2=d,now=e;
    }
    sta() {};
    int x1, y1;
    int x2, y2;
    int now;
} tmp;
bool can(int x,int y)
{
    if(x<0||y<0||x>=n||y>=m)
        return false;
    return true;
}
int main()
{
    int i, j, r1, r2;
    queue<sta> q;
    while(scanf("%d%d",&n,&m)!=EOF)
    {
        while(!q.empty()) q.pop();
        for(i=0; i<n; i++)
        {
            scanf("%s",&map[i]);
            for(j=0; j<m; j++)
            {
                if(map[i][j]=='Z')
                    sx=i, sy=j;
                if(map[i][j]=='S')
                    ex=i, ey=j;
                for(r1=0; r1<n; r1++)
                    for(r2=0; r2<m; r2++)
                        vis[i][j][r1][r2]=false;
            }
        }
        int x1, y1, x2, y2, ans, now, nx, ny, tx, ty;
        vis[sx][sy][ex][ey]=true;
        bool flag=false;
        q.push(sta(sx,sy,ex,ey,0));
        while(!q.empty())
        {
            tmp=q.front();
            q.pop();
            x1=tmp.x1, y1=tmp.y1, x2=tmp.x2, y2=tmp.y2, now=tmp.now;
            int ll=abs(x1-x2)+abs(y1-y2);
            if(ll<2)
            {
                ans=now,flag=true;
            }
            if(flag) break;
            for(i=0; i<4; i++)
            {
                nx=x1+dx[i], ny=y1+dy[i];
                if(can(nx,ny)&&map[nx][ny]!='X')
                {
                    tx=x2+dx[(i+2)%4], ty=y2+dy[(i+2)%4];
                    if(can(tx,ty)&&map[tx][ty]!='X')
                    {
                        if(!vis[nx][ny][tx][ty])
                            q.push(sta(nx,ny,tx,ty,now+1));
                        vis[nx][ny][tx][ty]=true;
                    }
                    else
                    {
                        if(!vis[nx][ny][x2][y2])
                            q.push(sta(nx,ny,x2,y2,now+1));
                        vis[nx][ny][x2][y2]=true;
                    }
                }
            }
        }
        if(flag)
            printf("%d\n",ans);
        else puts("Bad Luck!");
    }
    return 0;
}