import java.util.*;
import java.io.*;

public class factorial_recursive {

public static void main(String[] args) throws IOException {
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));

System.out.print("Enter max. value: ");
String maxStr = stdin.readLine();
int max = Integer.parseInt(maxStr);
System.out.println("Factorial of " + max + " = " + fact(max));
}

public static double fact(int n) {

if (n == 1) return 1.0; 
else return (n * fact(n-1));

}

}