Java-Factorial_BigInteger

import java.util.Scanner;
import java.math.BigInteger;

public class Main {


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

int n = Integer.parseInt(sc.nextLine());
BigInteger sum = new BigInteger(String.valueOf(1));

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


System.out.println(sum);

  }
}