import javafx.util.Pair;

import java.io.*;
import java.lang.reflect.Array;
import java.util.*;

public class Arsen {
    static ArrayList<Integer>[] gr;
    static boolean[] was;
    static int[] color;
    /*
        static int nextInt() throws IOException {
            while (!st.hasMoreTokens()) {
               st = new StringTokenizer(br.readLine());
            }
            return Integer.parseInt(st.nextToken());
        }
    static BufferedReader br;
    static StringTokenizer st = new StringTokenizer("");
    */

    static boolean dfs(int v, int c) {
        was[v] = true;
        color[v] = c;
        boolean ans = true;
        for (Integer to : gr[v]) {
            if (!was[to]) {
                ans &= dfs(to, 3 - c);
            } else {
                if (color[v] == color[to]) {
                    return false;
                }
            }
        }
        return ans;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);
        int n = in.nextInt();
        int m = in.nextInt();
        gr = new ArrayList[n];
        was = new boolean[n];
        color = new int[n];
        for (int i = 0; i < n; i++) {
            gr[i] = new ArrayList<>();
        }
        for (int i = 0; i < m; i++) {
            int from = in.nextInt() - 1;
            int to = in.nextInt() - 1;
            gr[from].add(to);
            gr[to].add(from);
        }
        for (int i = 0; i < n; i++) {
            if (!was[i]) {
                if (!dfs(i, 1)) {
                    out.print("NO");
                    out.close();
                    return;
                }
            }
        }
        out.println("YES");
        for (int i = 0; i < n; i++) {
            out.print(color[i] + " ");
        }
        out.close();

    }
}