import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int m = sc.nextInt();
        ArrayList<HashSet<Integer>> graph = new ArrayList<>();
        for (int i = 0; i < n; i++) {
            graph.add(new HashSet<>());
        }
        for (int i = 0; i < m; i++) {
            int a = sc.nextInt();
            int b = sc.nextInt();
            graph.get(a).add(b);
            graph.get(b).add(a);
        }
        boolean[] visited = new boolean[n];
        char[] ans = new char[n];
        for (int i = n - 1; i >= 0; i--) {
            if (visited[i]) {
                continue;
            }
            visited[i] = true;
            ans[n - i - 1] = '0';
            for (int x : graph.get(i)) {
                visited[x] = true;
                ans[n - x - 1] = '1';
                for (int y : graph.get(x)) {
                    if (y != i) {
                        graph.get(y).remove(x);
                    }
                }
            }
        }
        StringBuilder sb = new StringBuilder();
        boolean isStart = true;
        for (char c : ans) {
            if (c == '0') {
                if (isStart) {
                    continue;
                }
            } else {
                isStart = false;
            }
            sb.append(c);
        }
        System.out.println(sb);
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}