import java.util.Scanner;

public class zsn {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个整数n：");
        int n = scanner.nextInt();
        scanner.close();

        // 计算并输出s=1+2+3+..+n
        int s = 0;
        for (int i = 1; i <= n; i++) {
            s += i;
        }
        System.out.println("s = " + s);

        long factorial = 1;
        for (int i = 1; i <= n; i++) {
            factorial *= i;
        }
        System.out.println(n + "! = " + factorial);
    }
}