delete pics to save space

history_source/挑战程序设计竞赛/2.e.1.cpp

@@ -0,0 +1,65 @@
+#include<cstdio>
+#include<queue>
+//#include<mydef/screen.h>
+using namespace std;
+struct node
+{
+	int x,y;
+	node()
+	{
+		x=y=0;
+	}
+	node(int X,int Y)
+	{
+		x=X;
+		y=Y;
+	}
+};
+queue<node> que;
+int w,h,x,y,ans;
+char map[25][25];
+int dx[]={0,0,-1,1},dy[]={-1,1,0,0};
+void solve()
+{
+	while(que.size()>0) que.pop();
+	ans=1;
+	map[y][x]='#';
+	que.push(node(x,y));
+	node t;
+	while(que.size()>0)
+	{
+		t=que.front();
+		que.pop();
+		for(int i=0;i<4;i++)
+			if(t.x+dx[i]>=0&&t.x+dx[i]<w&&t.y+dy[i]>=0&&t.y+dy[i]<h&&map[t.y+dy[i]][t.x+dx[i]]=='.')
+			{
+				map[t.y+dy[i]][t.x+dx[i]]='#';
+				ans++;
+				que.push(node(t.x+dx[i],t.y+dy[i]));
+			}
+	}
+//	SetColor(10);
+	printf("%d\n",ans);
+//	SetColor(15);
+}
+int main()
+{
+	int i,j;
+	while(1)
+	{
+		scanf("%d%d",&w,&h);
+		if(w==0||h==0) break;
+		getchar();
+		for(i=0;i<h;i++)
+		{
+			for(j=0;j<w;j++)
+			{
+				map[i][j]=getchar();
+				if(map[i][j]=='@') x=j,y=i;
+			}
+			getchar();
+		}
+		solve();
+	}
+	return 0;
+}