#include <fstream>
#include <vector>
#include <cstdlib>
#include <stack>


using namespace std;

ifstream in("2sat.in");
ofstream out("2sat.out");

const int N=1e5+2;

vector <int> a1[2*N] , a1_t[2*N];
vector <int> *a,*a_t;
stack <int> s;

bool v1[2*N] , v1_t[2*N] , v1_v[2*N] , v1_f[2*N];
bool *viz , *viz_t , *val , *afis;
int n;

void dfs(int x)
{
    viz[x] = 1;
    for( auto i:a[x] )
    {
        if( !viz[i] )
        {
            dfs(i);
        }
    }
    s.push(x);
}

void dfs_t( int x )
{
    viz_t[x] = 1;
    if( !afis[x] )
    {
        afis[x] = afis[-x]=1;
        val[x]=0;
        val[-x]=1;
    }
    else
    {
        if( val[x] )
        {
            out<<-1;
            exit(0);
        }
    }
    for( auto i:a_t[x] )
    {
        if( !viz_t[x] )
        {
            dfs_t(i);
        }
    }
}

int main()
{
    int m;
    in >> n >> m;
    a = a1 + N;
    a_t = a1_t + N;
    viz = v1 + N;
    viz_t = v1_t + N;
    val = v1_v + N;
    afis = v1_f + N;
    for( int i = 1 ; i <=m ; i++ )
    {
        int x , y;
        in >> x >> y ;
        a[-x].push_back(y);
        a_t[y].push_back(-x);
        a[-y].push_back(x);
        a_t[x].push_back(-y);
    }
    for ( int i=-n ; i <=n ;i++ )
    {
        if( !viz[i] )
        {
            dfs(i);
        }
    }
    while( !s.empty() )
    {
        int x = s.top();
        s.pop();
        if(afis[x])
        {
            continue;
        }
        if( !viz_t[x] )
        {
            dfs_t(x);
        }
    }
    for( int i = 1 ; i <= n ; i++ )
    {
        out << val[i] << " ";
    }
    return 0;
}