Big Factorial

package com.company;


import java.math.BigInteger;
import java.util.*;

public class Main {

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

        int n = scanner.nextInt();
        BigInteger f = new BigInteger(String.valueOf(1));

        for (int i = 1; i <= n; i++) {
            f = f.multiply(BigInteger.valueOf(i));


        }
        System.out.println(f);


    }

}