#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<map>
#include<queue>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
using namespace std;


int main(){

  int n, m;
  cin >> n >> m;
  vector<int> a(m);
  vector<int> b(m);
  for(int i=0; i<m; i++){
    cin >> a[i] >> b[i];
  }

  vector<int> ans(n, 0);
  vector<bool> f(n, false);
  int mx = n-1;
  while(true){
    if( mx < 0 ) break;
    bool q = true;

    if( f[mx] ){
      mx--;
      continue;
    }

    for(int i=0; i<m; i++){
      if( b[i] == mx ){
        q = false;
        f[ a[i] ] = true;
        cerr << a[i] << endl;
      }
      if( a[i] == mx ){
        q = false;
        f[ b[i] ] = true;
      }
    }
    if( q ){
      f[mx] = true;
    }
    mx--;

  }
  reverse(f.begin(), f.end());

  bool fl = false;
  for(int i=0; i<n; i++){
    if( !fl && !f[i] ){
      continue;
    }else if( f[i] ){
      fl = true;
      cout << ( f[i] ? 1 : 0 );
    }else{
      cout << ( f[i] ? 1 : 0 );
    }
  }
  cout << endl;

  return 0;
}