import java.util.Scanner;

public class Yukicoder72 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong();
		long up = (n / 2) % 1000007;
		long down = (n - up) % 1000007;
		
		long res = (down + 1) * up % 1000007 + down;
		System.out.println(res % 1000007);
	}
}