import java.util.Scanner;

public class N500
{
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		long N=sc.nextLong();
		long ans =1;
		String sans="";
		if(N<50)
		{
		for(int i=2;i<=N;i++)
		{
			ans*=i;
			ans%=(long)Math.pow(10, 12);

		}
		sans=String.valueOf(ans);
		if(N>14)
			{
				if(sans.length()<12)
				{
					int b=12-sans.length();
					for(int i=0;i<b;i++)
					{
						sans="0"+sans;
					}
				}
			}
		else
			{

			}
		}
		else
		{
			sans="000000000000";
		}
		System.out.println(sans);
	}
}