import java.io.*; 
class Factorial{
	public static void main(String[] args) {
			try{
				BufferedReader object = new BufferedReader(new InputStreamReader(System.in));
				System.out.println("enter the number");
				int a= Integer.parseInt(object.readLine());
				int fact= 1;
				System.out.println("Factorial of " +a+ ":");
				for (int i= 1; i<=a; i++){
							fact=fact*i;
				}
				System.out.println(fact);
		}
		catch (Exception e){}
	}
}