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();
        for (int i = 1; i * i <= n; i++) {
            for (int j = i; j * i <= n; j++) {
                int remain = n - i * j;
                for (int k = 1; i + j + k < 250; k++) {
                    if (remain % k == 0 && i + j + k + remain / k <= 250) {
                        ArrayList<Integer> ans = getList(i, j, k, remain / k);
                        System.out.println(ans.size());
                        System.out.println(ans.stream().map(x -> x.toString()).collect(Collectors.joining(" ")));
                        return;
                    }
                }
            }
        }
    }
    
    static ArrayList<Integer> getList(int a, int b, int c, int d) {
        ArrayList<Integer> ans = new ArrayList<>();
        while (a-- > 0) {
            ans.add(3);
        }
        while (b-- > 0) {
            ans.add(4);
        }
        while (c-- > 0) {
            ans.add(5);
        }
        while (d-- > 0) {
            ans.add(6);
        }
        return ans;
    }
}
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();
    }
    
}