#include
#define?MAXN?502
using?namespace?std;
int?nm;
int?fx[3]={01}fy[3]={10};
bool?mapn[MAXN][MAXN]vis[MAXN][MAXN];
int?xoneyonextwoytwot;
inline?void?dfs（int?xint?y）
{
	if（x==xtwo&&y==ytwo）
	{
		//vis[x][y]=true;
		return;
	}
	for（int?i=0;i<2;i++）
	{
		int?nx=x+fx[i]ny=y+fy[i];
		if（nx<=n&&nx>=1&&ny<=m&&ny>=1&&vis[nx][ny]==false&&mapn[nx][ny]==true）
		{
			vis[nx][ny]=true;
			dfs（nxny）;
		}
	}
	return;
}
int?main（）
{
	//freopen（“in3.txt““r“stdin）;
	//freopen（“out3.txt““w“stdout）;
	freopen（“boardgame.in““r“stdin）;
	freopen（“boardgame.out““w“stdout）;
	scanf（“%d%d“&n&m）;
	for（int?i=1;i<=n;i++）
		for（int?j=1;j<=m;j++）
		{
			char?c;
			cin>>c;
			if（c==‘.‘）mapn[i][j]=true;
			if（c==‘#‘）mapn[i][j]=false;
		}
	cin>>t;
	for（int?i=1;i<=t;i++）
	{
		scanf（“%d%d%d%d“&xone&yone&xtwo&ytwo）;
		dfs（xoneyone）;
		if（vis[xtwo][ytwo]）printf（“Yes\n“）;
		else?printf（“No\n“）;
		memset（vis0sizeof（vis））;
	}
	return?0;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????32262??2019-07-13?13:46??exam\boardgame\外星羅盤.docx

?????文件??????30618??2019-07-13?18:28??exam\sequence\二次函數(shù)數(shù)列.docx

?????文件??????18456??2019-07-13?13:58??exam\sum3\sum3.docx

?????目錄??????????0??2019-07-13?13:59??exam\boardgame

?????目錄??????????0??2019-07-13?13:59??exam\sequence

?????目錄??????????0??2019-07-13?13:59??exam\sum3

?????目錄??????????0??2019-07-13?13:59??exam

?????文件???????1010??2019-07-13?17:13??my?cpp\boardgame\boardgame.cpp

?????文件????????523??2019-07-13?17:22??my?cpp\sequence\sequence.cpp

?????文件???????1086??2019-07-13?17:14??my?cpp\sum3\sum3.cpp

?????文件??????75591??2019-07-13?20:10??result\exam?簡版.pdf

?????文件?????538858??2019-07-13?19:26??result\exam.pdf

?????目錄??????????0??2019-07-14?04:19??my?cpp\boardgame

?????目錄??????????0??2019-07-14?04:19??my?cpp\sequence

?????目錄??????????0??2019-07-14?04:19??my?cpp\sum3

?????目錄??????????0??2019-07-14?04:19??my?cpp

?????目錄??????????0??2019-07-15?17:40??result

?????文件???????1654??2019-07-13?17:52??std\boardgame\boardgame.cpp

?????文件???????2850??2019-07-13?18:05??std\result.xml

?????文件????????961??2019-07-13?17:05??std\sequence\sequence.cpp

?????文件????????986??2019-07-13?18:49??std\sum3\sum3.cpp

?????文件?????????86??2017-10-03?02:09??data\boardgame1.in

?????文件?????????24??2017-10-03?02:09??data\boardgame1.out

?????文件????8849204??2019-07-13?17:24??data\boardgame10.in

?????文件????2616202??2019-07-13?17:24??data\boardgame10.out

?????文件????????141??2017-10-03?02:09??data\boardgame2.in

?????文件?????????53??2017-10-03?02:09??data\boardgame2.out

?????文件??????22887??2019-07-13?17:19??data\boardgame3.in

?????文件???????4669??2019-07-13?17:19??data\boardgame3.out

?????文件????????601??2019-07-13?17:20??data\boardgame4.in

............此處省略61個文件信息