#include <iostream>
#include <fstream>
#include <stack>
#include <vector>
#include <deque>
#include <ctime>
#include <queue>
#include <cmath>

#define ll long long
#define ull unsigned long long
#define pb push_back
#define mp make_pair
using zint = int;
using namespace std;
const int inf = 3e4 + 5;
const int NMax = 1e5 + 5;
const int MMax = 2e5 + 5;
const int coef = 20;
ifstream in("2sat.in");
ofstream out("2sat.out");

zint N,M,P;
zint sol[NMax],aux[NMax];
pair<zint,zint> ex[MMax];

struct elem {
    zint lit,nrE;
    elem (zint _lit = 0,zint _nrE = 0) {
        lit = _lit;
        nrE = _nrE;
    }
};
vector<elem> v[NMax];

bool eval(zint);
void cpy(zint*,zint*);

int main() {
    in>>N>>M;
    for (int i=1;i <= M;++i) {
        zint x,y;
        in>>x>>y;
        ex[i] = mp(x,y);
    }

    srand(time(0));
    for (int i=1;i <= N;++i) {
        sol[i] = rand()%2;
    }

    bool noSol = true;
    ll lim = coef*N;
    while (noSol && lim--) {
        bool curr = true;

        for (int i=1;i <= M;++i) {
            if (eval(i)) {
                continue;
            }

            curr = false;
            if (rand() % 2 == 0) {
                sol[abs(ex[i].first)] ^= 1;
            }
            else {
                sol[abs(ex[i].second)] ^= 1;
            }
            //cout<<i<<' ';
            break;
        }

        noSol = !curr;

        /*
        cout<<noSol<<'\n';
        for (int i=1;i <= N;++i) {
            cout<<sol[i]<<' ';
        }
        cout<<"\n\n";
        //*/
    }

    if (noSol) {
        out<<"-1\n";
    }
    else {
        for (int i=1;i <= N;++i) {
            out<<sol[i]<<' ';
        }

        /*
        cout<<"YE\n";
        for (int i=1;i <= M;++i) {
            if (!eval(i)) {
                cout<<"BAD\n";
                break;
            }
        }
        //*/
    }

    in.close();out.close();
    return 0;
}

bool eval(zint nr) {
    zint x = ex[nr].first,
        y = ex[nr].second,
        val1 = sol[abs(x)],
        val2 = sol[abs(y)];
    if (x < 0) { val1 ^= 1; }
    if (y < 0) { val2 ^= 1; }

    return (val1 | val2);
}