import java.io.*;
import java.util.Locale;
import java.util.StringTokenizer;


public class D {
    String filename = "addition";//filename here, System.in/out if no file

    FastScanner in;
    PrintWriter out;


    void solve() {
//your code here
        int n = in.nextInt();
        int k = in.nextInt();
        int[] res = new int[k];
        for (int i = 0; i < k; i++) {
            res[i] = in.nextInt();
        }
        int a = n;
        int b = n;
        int x = k;
        int i = 0;
        int z = -1;
        int ans = -1;
        boolean fl = true;
        boolean f = true;
        while (x > 0) {
            if (x < a && fl == true) {
                z = i;
                fl = false;
            }
            if (x < b && fl == true) {
                z = i;
                fl = false;
            }
            if (fl == false && f == true){
                ans = i;
                f = false;
            }

            if ((a == 1 || b == 1) && f == true && fl == false) {
                ans = i;
                f = false;
            }
            if (res[i] == 1) {
                a--;
            } else {
                b--;
            }
            x--;
            i++;
        }
        if (z == -1) {
            z = k;
        }
        if (ans == -1){
            ans = k;
        }
        out.println(z);
        for (int j = 0; j < ans; j++) {
            out.print(0 + " ");
        }
        for (int j = 0; j < k - ans; j++) {
            out.print(1 + " ");
        }
    }

    void run() throws IOException {
        InputStream input = System.in;
        OutputStream output = System.out;
     /*   try {
            File f = new File(filename + ".in");
            if (f.exists() && f.canRead()) {
                input = new FileInputStream(f);
                output = new FileOutputStream(filename + ".out");
            }
        } catch (IOException e) {
        }*/
        in = new FastScanner(input);
        out = new PrintWriter(new BufferedOutputStream(output));
        solve();
        in.close();
        out.close();
    }

    public static void main(String[] args) throws IOException {
        Locale.setDefault(Locale.US);
        new D().run();
    }

    class FastScanner implements Closeable {
        private BufferedReader br;
        private StringTokenizer tokenizer;

        public FastScanner(InputStream stream) throws FileNotFoundException {
            br = new BufferedReader(new InputStreamReader(stream));
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public String nextLine() {
            if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    return br.readLine();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken("\n");
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }

        @Override
        public void close() throws IOException {
            br.close();
        }
    }
}