package factorial;

class Factorial {
	int n;

	Factorial(int n) { this.n=n; }

	int value() {
		int v=1;
		for(int i=2;i<=n;i++) { v=v*i; }
		return v;
	}

	public static void main(String args[]) {
		int n=Integer.parseInt(args[0]);
		Factorial f=new Factorial(n);
		System.out.println("Factorial " + n +" = " + f.value());
	}
}