import java.util.*;

public class FactorialSumCalculator {

int n;

FactorialSumCalculator(int nn) {

n = nn;

}

public int factorial(int a) {

int fact = 1;

for (int i = 1; i <= a; i++) {

fact = fact * i;

}

return fact;

}

public void display() {

System.out.println("Number=" + n);

}

}

class Series extends FactorialSumCalculator {

int sum;

Series(int nn) {

super(nn); // Call superclass constructor with nn argument

sum = 0;

}

void calcSum() {

for (int i = 1; i <= n; i++) {

sum = sum + super.factorial(i);

}

}

public void display() {

System.out.println("Sum:" + sum);

}

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.print("Enter a number: ");

int input = sc.nextInt();

Series ob = new Series(input); // Pass input as argument to the Series constructor

ob.calcSum();

ob.display();

}

}