//关灯问题II
#include<iostream>
#include<queue>
#include<bits/stdc++.h>
// #include<bitset>
using namespace std;
const int maxn=110, maxs=3E4, inf=0x3f3f3f3f;
int n, m, a[maxn][maxn], len[maxn];
int st;//
bool vis[maxs];
queue<int> q;
int main(){
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		for(int j=1;j<=n;j++){
			cin>>a[i][j];
		}
	}

	for(int j=1;j<=n;j++){//现在这些灯都是开的
		st|=(1<<j);
	}
	memset(len, inf, sizeof len);

	q.push(st);
	vis[st]=true;
	len[st]=0;
	cout<<st<<endl;
	while(!q.empty()){
		int cur=q.front();
		q.pop();
		if(cur==0)	break;//目标是灯全关闭
		for(int i=1;i<=m;i++){
			int temp=cur;
			for(int j=1;j<=n;j++){
				if(a[i][j]==1){//关第j灯
					temp&=( (1<<(n+1))-1-(1<<j) );
				}else if(a[i][j]==-1){//开第j灯
					temp|=(1<<j);
				}
			}
			cout<<temp<<endl;
			if(!vis[temp]){
				len[temp]=len[cur]+1;
				vis[temp]=true;
			}
		}
	}
	cout<<(len[0]==inf? -1:len[0]);
	return 0;
}

#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<string>
#include<ctime>
#include<algorithm>

using namespace std;

int nums[100001],n,fno,target,jian=0,i;
const string fname="problem";

int main()
{
	srand(time(NULL));
	
	cout<<"Input file number:";
	cin>>fno;
	
	cout<<"Input n:";
	cin>>n;
	
	freopen((fname+to_string(fno)+".in").c_str(),"w",stdout);
	
	cout<<n<<'\n';
	
	target=2;
	
//	jian=rand()%n;
	
	for(i=0;i<n-jian;++i)
		nums[i]=rand();
		
	for(;i<n;++i)
		nums[i]=target;
		
	sort(nums,nums+n);
	
	for(int i=0;i<n;++i)
		cout<<nums[i]<<' ';
		
	cout<<'\n'<<target<<'\n';
	
	freopen("con","w",stdout);
	
	cout<<(find(nums,nums+n,target)!=nums+n);
	
	return 0;
}