#include <bits/stdc++.h>
using namespace std;
#define rep(i, j) for(int i=0; i < (int)(j); i++)
#define rrep(i, j) for(int i=(j)-1; i >= 0; i--)
#define all(v) v.begin(),v.end()
// vector
template<class T> istream& operator >> (istream &is , vector<T> &v) { for(T &a : v) is >> a; return is; }

class Solver {
  public:
    bool solve() {
        int N, M; cin >> N >> M;        
        vector<bool> need(N);
        rep(i, M) {
            int a, b; cin >> a >> b;
            need[min(a, b)] = true;
        }        
        reverse(all(need));
        string s = "";
        for(bool flg : need) {
            s += flg ? "1" : "0";
            if(s == "0") s = "";
        }
        cout << s << endl;
        return 0;
    }
};

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    Solver s;
    s.solve();
    return 0;
}