//coded by:- aniketkoli183@gmail.com
//for more codes visit here:- http://jerryindia.home.blog
import java.util.*;
class javafactorial
{
public static void main(String[] args)
{
int no=Integer.parseInt(args[0]);
int tempo=1;
for(int i=1;i<=no;i++)
{
tempo*=i;
}
System.out.println("\nFactorial is:= "+tempo);
}
}