View Code of Problem 441

#include<iostream>
#include<algorithm>
#include<Cstring>
using namespace std;
int n,m,flag;
int a[15][15],f[15][15];
void fun(int x,int y,int d){
	for(int i=x;i<x+d;++i){
		for(int j=y;j<y+d;++j){
			if(a[i][j]==0||f[i][j]==1)
			flag=0;
			f[i][j]=1;
		}
	}
	for(int i=y;i<y+d;++i)
	if(a[x-1][i]==1)
	flag=0;
	for(int i=y;i<y+d;++i)
	if(a[x+d][i]==1)
	flag=0;
	for(int i=x;i<x+d;++i)
	if(a[i][y-1]==1)
	flag=0;
	for(int i=x;i<x+d;++i)
	if(a[i][y+d]==1)
	flag=0;
	
}
int main(){
	while(cin>>n>>m&&(n!=0||m!=0)){
		int f1=0;
		flag=1;
		memset(f,0,sizeof(f));
		memset(a,0,sizeof(f));
		for(int i=1;i<=n;++i){
			for(int j=1;j<=m;++j){
				scanf("%d",&a[i][j]);
				if(a[i][j]==0)
				f1=1;
			}
		}
		if(!f1){
			cout<<"No"<<endl;
			continue;
		}
		for(int i=1;i<=n;++i){
			for(int j=1;j<=m;j++){
				if(a[i][j]==1&&f[i][j]==0){
					int d=1;
					while(a[i][j+1]==1){
						j++;
						d++;
					}
					fun(i,j-d+1,d);
				}
			}
		}
		if(flag)
		cout<<"Yes"<<endl;
		else
		cout<<"No"<<endl;
		
	}
}
/*
Main.cc:3:9: fatal error: Cstring: No such file or directory
 #include<Cstring>
         ^~~~~~~~~
compilation terminated.
*/