#include <fstream>
#include <iostream>

using namespace std;

const int MAXM = 200005;

pair<int, int> prop[MAXM];

int main()
{
    ifstream fin("2sat.in");
    ofstream fout("2sat.out");
    int n, m;
    fin >> n >> m;
    for(int i = 1; i <= m; ++i){
        int x, y;
        fin >> x >> y;
        prop[i] = {x, y};
    }
    for(int i = 0; i < (1 << n); ++i){
        bool expr = 1;
        for(int j = 1; j <= m; ++j){
            bool x = ((i & (1 << (abs(prop[j].first) - 1))) > 0), y = ((i & (1 << (abs(prop[j].second) - 1))) > 0);
            if(prop[j].first < 0) x = !x;
            if(prop[j].second < 0) y = !y;
            expr &= (x | y);
        }
        if(expr){
            for(int j = 0; j < n; ++j) fout << ((i & (1 << j)) > 0) << " ";
            return 0;
        }
    }
    fout << -1;
    return 0;
}