> #include <stdio.h>
> #include <string.h>
> 
> struct data
> {
>     int x,y;
> }queue[20000],now,next;
> 
> int in,out;
> int mov[8][2]={{-1,0}, {-1,-1}, {0,-1}, {1,-1}, {1,0}, {1,1}, {0,1}, {-1,1}};
> char field[102][102];
> int m,n;
> int ans;
> int k;
> 
> void bfs(int i,int j)
> {
>     in=out=0;
>     queue[in].x=i;
>     queue[in].y=j;
>     field[i][j]='*';
>     in++;
> 
>     while(in!=out)
>     {
>         now=queue[out++];
>         for(k=0;k<8;k++)
>         {
>             next.x=now.x+mov[k][0];
>             next.y=now.y+mov[k][1];
>             if(field[next.x][next.y]=='@')
>             {
>                 field[next.x][next.y]='*';
>                 queue[in++]=next;
>             }
>         }
>     }
> }
> 
> int main()
> {
>     //freopen("in","r",stdin);
>     int i,j;
> 
>     while(scanf("%d%d",&m,&n),m)
>     {
>         ans=0;
>         memset(field,'*',sizeof(field));
> 
>         while(getchar()==' ');
>         for(i=1;i<=m;i++)
>         {
>             scanf("%s",field[i]+1);
>         }
>         for(i=1;i<=m;i++)
>         {
>             for(j=1;j<=n;j++)
>             {
>                 if(field[i][j]=='@')
>                 {
>                     bfs(i,j);
>                     ans++;
>                 }
>             }
>         }
>         printf("%d\n",ans);
>     }
> }