import java.util.Scanner;

public class Yuki072 {
    public static void main(String[] args) {
        Yuki072 hoge = new Yuki072();
    }

    Yuki072() {
        Scanner scanner = new Scanner(System.in);
        long N = scanner.nextLong();
        long mod = 1000007L;

        long i = N / 2;
        long tmp = (((i + 1) % mod) * ((N - i) % mod));
        System.out.println((i % mod) + tmp % mod);
    }

}