delete pics to save space

2.572.cpp

@@ -0,0 +1,28 @@
+#include<cstdio>
+#include<cstring>
+const int maxn=105;
+char pic[maxn][maxn];
+int m,n,idx[maxn][maxn];
+void dfs(int r,int c,int id)
+{
+	if(r<0||r>=m||c<0||c>=n) return;
+	if(idx[r][c]>0||pic[r][c]!='@') return;
+	idx[r][c]=id;
+	for(int dr=-1;dr<=1;dr++)
+		for(int dc=-1;dc<=1;dc++)
+			if(dr!=0||dc!=0) dfs(r+dr,c+dc,id);
+}
+int main()
+{
+	while(scanf("%d%d",&m,&n)==2&&m&&n)
+	{
+		for(int i=0;i<m;i++) scanf("%s",pic[i]);
+		memset(idx,0,sizeof(idx));
+		int cnt=0;
+		for(int i=0;i<m;i++)
+			for(int j=0;j<n;j++)
+				if(idx[i][j]==0&&pic[i][j]=='@') dfs(i,j,++cnt);
+		printf("%d\n",cnt);
+	}
+	return 0;
+}