#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define o(a) cout << a << endl
#define int long long
using namespace std;
typedef pair<int, int> P;

signed main(){
    int n, m;
    cin >> n >> m;
    vector<bool> f(n, false);
    vector<P> d;
    rep(i, 0, m){
        int a, b;
        cin >> a >> b;
        if(a < b) swap(a, b);
        d. push_back(P(a, b));
    }
    sort(all(d));
    reverse(all(d));
    rep(i, 0, d.size()){
        if(f[d[i].first] || f[d[i].second]) continue;
        f[d[i].second] = true;
    }
    string s = "";
    repb(i, n - 1, 0){
        if(s == "" && f[i] == false) continue;
        else{
            if(f[i]) s += "1";
            else s += "0";
        }
    }
    cout << s << endl;
}