/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.06.05 01:30:06
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    int n, m;
    cin >> n >> m;
    vector< vector< int > > g(n);
    for (int i = 0; i < m; i++) {
        int u, v;
        cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    vector< bool > used(n, false);
    vector< int > ans(n, 0);
    for (int i = n - 1; i >= 0; i--) {
        if (used[i]) continue;
        used[i] = true;
        for (int v : g[i]) {
            ans[v] = 1;
            used[v] = true;
        }
    }
    bool ok = false;
    for (int i = n-1; i >= 0; i--) {
        if (ans[i] == 1) {
            cout << ans[i];
            ok = true;
        } else if (ok) {
            cout << ans[i];
        }
    }
    cout << endl;
    return 0;
}