public class prog {

    public static void main(String[] args) {
        java.util.Scanner scan = new java.util.Scanner(System.in);
        int n =scan.nextInt();
        int fact=1;
        if(n>=2 && n<=(int)Math.pow(10,9)){
        for(int i=2;i<n;i++)
            fact*=i;
        System.out.println(fact%n);
        return;
        }
        System.out.println(0);

    }
}