factorial

package domashni;

import java.util.Scanner;

public class fact {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);

		int number = scan.nextInt();

		int fact = 1;
		for(int i = 1; i <= number; i++) {
			fact = fact * i;
		}
		System.out.println(fact);
	}
}