#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <set>
using namespace std;

int main()
{
	int n, m; cin >> n >> m;

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

	vector<int>cnt(m);
	int size = 0;
	int last = 0;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < V[i].size();j++) {
			if (cnt[V[i][j]] == 0)size++;
			cnt[V[i][j]]++;
		}

		if (size == m) {
			last = i;
			break;
		}
	}

	string ans = "";
	for (int i = last; i >= 0; i--) {
		bool iranai = true;
		for (int j = 0; j < V[i].size(); j++) {
			if (cnt[V[i][j]] == 1) {
				iranai = false;
				break;
			}
		}

		if (iranai) {
			for (int j = 0; j < V[i].size(); j++)cnt[V[i][j]]--;
			ans += '0';
		}
		else {
			ans += '1';
		}
	}

	cout << ans << endl;

    return 0;
}