UVa 572 Oil Deposits

#include<cstdio>
#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
char pic[105][105];
void dfs(int x, int y) {
	if (pic[x][y] == ‘@‘) {
		pic[x][y] = ‘*‘;
		dfs(x, y + 1);
		dfs(x + 1, y);
		dfs(x + 1, y + 1);
		if (x > 0) {
			dfs(x - 1, y);
			dfs(x - 1, y + 1);
			if (y > 0) dfs(x - 1, y - 1);
		}
		if (y > 0) {
			dfs(x, y - 1);
			dfs(x + 1, y - 1);
		}
	}
}
int main() {
	int m, n;
	while (scanf("%d%d", &m, &n) == 2 && m && n) {
		memset(pic, 0, sizeof(pic));
		for (int i = 0; i != m; ++i) {
			for (int j = 0; j != n; ++j) {
				scanf(" %c", &pic[i][j]);
			}
		}
		int ans(0);
		for (int i = 0; i != m; ++i) {
			for (int j = 0; j != n; ++j) {
				if (pic[i][j] == ‘@‘) {
					dfs(i, j);
					++ans;
				}
			}
		}
		printf("%d\n", ans);
	}
	return 0;
}