红与黑棋盘

import java.util.ArrayList;
import java.util.Scanner;

public class 红与黑 {
    static int co=0;
    static ArrayList list=new ArrayList<>();
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int x=0,y=0;//记录初始位置
        //初始化
        while (true) {
            int l=sc.nextInt();
            int h=sc.nextInt();
            if(l==0&&h==0)
                break;
            for (int i = 0; i < h; i++) {
                String s=sc.next();
                char c[]=s.toCharArray();
                list.add(c);
            }
            //记录初始位置
            for (int i = 0; i < h; i++) {
                for (int i1 = 0; i1 < l; i1++) {
                    if(list.get(i)[i1]=='@')
                    {
                        x=i;y=i1;
                    }
                }
            }
           bfs(x, y);
            System.out.println(co);
        }

    }
    private static void bfs(int x,int y){
        if(x<0||x==9||y<0||y==6||list.get(x)[y]=='#')
            return ;
         ++co;
        list.get(x)[y]='#';
        bfs(x+1, y);
        bfs(x-1, y);
        bfs(x, y+1);
        bfs(x, y-1);
    }
}