백준 10872 팩토리얼 / java

import java.io.IOException;
import java.math.BigInteger;
import java.util.*;
public class Main {

	public static void main(String[] args)  throws NumberFormatException, IOException {
		Scanner sc = new Scanner(System.in);
		int num = sc.nextInt();
		BigInteger result = new BigInteger("1");
		
		for(int i = 1 ; i <= num; i++) {
			result = result.multiply(BigInteger.valueOf(i));
		}
		
		System.out.println(result);
	}
}