#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> P;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n, m;
	cin >> n >> m;
	vector<P> edges(m);
	vector< vector<int> > g(n);
	for (int i = 0; i < m; i++) {
		cin >> edges[i].first >> edges[i].second;
		g[edges[i].first].push_back(i);
		g[edges[i].second].push_back(i);
	}
	vector<bool> used(m, false);
	bool flag2 = false;
	for (int i = n - 1; i >= 0; i--) {
		bool flag = false;
		for (int j : g[i]) {
			if (used[j]) continue;
			if (i < edges[j].first || i < edges[j].second) {
				flag = true;
				break;
			}
		}
		if (flag) {
			for (int j : g[i]) {
				used[j] = true;
			}
		}
		if (flag && !flag2) flag2 = true;
		if (!flag2) continue;
		if (flag) cout << 1;
		else cout << 0;
	}
	cout << endl;
	return 0;
}