572

#include <cstdio>
#include <cstring>

using namespace std;

char grid[100][100];
int x[] = {1,1,1,0,0,-1,-1,-1};
int y[] = {1,0,-1,1,-1,1,0,-1};
bool didVisit[100][100];
int row,column,cnt;

void operationTorchlight(int a,int b) {
    didVisit[a][b] = 1;
    int p,X,Y;
    for (p=0;p<8;p++) {
        X = a + x[p];
        Y = b + y[p];
        if (X>=0 && X<row && Y>=0 && Y<column && !didVisit[X][Y]) {
            didVisit[X][Y] = 1;
            if (grid[X][Y] == '@') {
                operationTorchlight(X,Y);
            }
        }
    }
}

int main() {
    while (1) {
        scanf("%d%d",&row,&column);
        if (row == 0 && column == 0) break;
        cnt=0;

        int i,j;

        for (i=0;i<row;i++) scanf("%s", &grid[i]);

        for (i=0;i<row;i++) {
            for (j=0;j<column;j++) {
                if (!(didVisit[i][j])) {
                    didVisit[i][j] = 1;
                    if (grid[i][j] == '@') {
                        cnt++;
                        operationTorchlight(i,j);
                    }
                }
            }
        }
        printf("%d\n", cnt);
        for(i=0;i<100;i++) {
            for (j=0;j<100;j++) grid[i][j] = '*';
        }
    }
    return 0;
}