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Re:dfs 纯是自己做的,一次ac了,太爽了!!

Posted by 15038029147 at 2010-04-18 22:40:53 on Problem 1562
In Reply To:dfs 纯是自己做的,一次ac了,太爽了!! Posted by:wangbaobao at 2009-05-11 20:56:29
> #include"iostream"
> using namespace std;
> int m,n;
> char array[101][101];
> int  path[101][101];
> void dfs(int i,int j)
> {
> 	path[i][j]=1;          //对没走过的点进行置1 记录表示已经走过不能在走了。
> 	if(i-1>=0&&array[i-1][j]=='@'&&path[i-1][j]==0)   
> 		 dfs(i-1,j);
> 	if(i+1<m&&array[i+1][j]=='@'&&path[i+1][j]==0)
> 		dfs(i+1,j);
> 	if(j-1>=0&&array[i][j-1]=='@'&&path[i][j-1]==0)
> 		dfs(i,j-1);
> 	if(j+1<n&&array[i][j+1]=='@'&&path[i][j+1]==0)
> 		dfs(i,j+1);
> 	if(i-1>=0&&j-1>=0&&array[i-1][j-1]=='@'&&path[i-1][j-1]==0)
> 		dfs(i-1,j-1);
> 	if(i-1>=0&&j+1<n&&array[i-1][j+1]=='@'&&path[i-1][j+1]==0)
> 		dfs(i-1,j+1);
> 	if(i+1<m&&j-1>=0&&array[i+1][j-1]=='@'&&path[i+1][j-1]==0)
> 		dfs(i+1,j-1);
> 	if(i+1<m&&j+1<n&&array[i+1][j+1]=='@'&&path[i+1][j+1]==0)
> 		dfs(i+1,j+1);
> }
> 
> 
> int main()
> {
> 	
> 	while(cin>>m>>n,m)
> 	{
> 		int count=0;                    //用于对路径进行计算
> 		memset(path,0,sizeof(path));    // 对path数组初始化,0表示没有走过
> 		int i,j;
> 		for( i=0;i<m;i++)
> 			for( j=0;j<n;j++)
> 		         cin>>array[i][j];
> 		
> 		for(i=0;i<m;i++)
> 			for(j=0;j<n;j++)
> 			{
> 				if(array[i][j]=='@'&&path[i][j]==0)
> 				{
> 					count++;
> 				
> 					dfs(i,j);      // 深度搜索
> 				}
> 			}
> 			cout<<count<<endl;
> 	}
> 	return 1;
> }
> 				
> 
> 	
哈哈 传说中的floodfill啊   1A

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