import java.util.ArrayList; import java.util.Scanner;public class 红与黑 {static int co=0;static ArrayList<char[]> 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);} }