import java.util.Arrays;
import java.util.Scanner;

public class B1 {
    final static int N = 1977;

    public static void main(String[] args) {
        double length = 0;
        for (int i = 2; i <= N; i++) {
            length += Math.log10(i);
        }
        int size = (int) length + 1;
        System.out.println(size);
        int[] a = new int[size];
        a[size - 1] = 1;
        for (int n = 2; n <= N; n++) {

            int sc = 0;
            for (int i = size - 1; i >= 0; i--) {
                a[i] *= n;
                a[i] += sc;
                sc = a[i] / 10;
                a[i] %= 10;
            }
        }
        for (int i = 0; i < size; i++) System.out.print(a[i]);
        System.out.println();
        cin.close();
    }

    static Scanner cin = new Scanner(System.in);
}