UVa 11244 - Counting Stars

#include <iostream>
#include <cstdlib>
#include <cstdio>

using namespace std;

char sky[101][101];

int dxy[8][2] = {1,-1,1,0,1,1,0,-1,0,1,-1,-1,-1,0,-1,1};
int floodfill(int x, int y, int n , int m)
{
	if (x < 0 || x >= n || y < 0 || y >= m)	return 0;
	if (sky[x][y] == '.') return 0;
	sky[x][y] = '.';
	int sum = 1;
	for (int k = 0 ; k < 8 ; ++ k)
		sum += floodfill(x+dxy[k][0], y+dxy[k][1], n, m);
	return sum;
}

int main()
{
	int n,m;
	while (scanf("%d%d",&n,&m) && n) {
		for (int i = 0 ; i < n ; ++ i)
			scanf("%s",sky[i]);
		
		int count = 0;
		for (int i = 0 ; i < n ; ++ i)
		for (int j = 0 ; j < m ; ++ j)
			if (sky[i][j] == '*')
				count += (floodfill(i, j, n, m) == 1);
		
		printf("%d\n",count);
	}
	
	return 0;
}