题目

#include<bits/stdc++.h>
using namespace std;
int t,n,m;
char a[1005][1005];
char g[4][4]={'0','0','0','0',
			  '0','1','1','0',
              '0','1','1','0',
              '0','0','0','0'};             
int main(){
	cin>>t;
	for(int d=1;d<=t;d++){
		cin>>n>>m;
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++)cin>>a[i][j];
		}
		int c=0;
		for(int i=0;i<=n-4;i++){
			for(int j=0;j<=m-4;j++){
				for(int i1=0;i1<4;i1++){
					for(int j1=0;j1<4;j1++){
						if(g[i1][j1]!=a[i][j])c=1;
					}
				}
			}
		}
		if(c==0)cout << "Yes" << endl;
		else cout << "No" << endl;
	}
	return 0;
}