function Main(input) {

  let inputs = input.split('\n');

  let n, m;
  [n, m] = inputs[0].split(' ').map((e) => e - 0);

  let a = new Array(m);
  let b = new Array(m);
  for (let i = 0; i < m; ++i) {
    [a[i], b[i]] = inputs[1 + i].split(' ').map((e) => e - 0);
  }

  let g = new Array(n);
  for (let i = 0; i < n; ++i) {
    g[i] = new Array(0);
  }
  for (let i = 0; i < m; ++i) {
    g[a[i]].push(b[i]);
    g[b[i]].push(a[i]);
  }

  let ans = '';
  let killed = new Array(n).fill(false);
  for (let i = n - 1; i >= 0; --i) {
    let must_have = false;
    for (let j = 0; j < g[i].length; ++j) {
      must_have |= killed[g[i][j]];
    }
    if (must_have) {
      ans += '1';
    } else {
      if (ans.length > 0) ans += '0';
      killed[i] = true;
    }
  }

  console.log('%s', ans);

}

Main(require('fs').readFileSync('/dev/stdin', 'utf8'));