UVA - 623 500!

import java.math.BigInteger;
import java.util.Scanner;

public class Main {

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  Scanner sc = new Scanner(System.in);
  int n;
  while(sc.hasNext())
  {
   n=sc.nextInt();
   BigInteger B = BigInteger.valueOf(1);
   for(int i=n;i>1;i--)
    B = B.multiply(BigInteger.valueOf(i));
   System.out.println(n+"!");
   System.out.println(B);
  }
 }
}