import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long N = sc.nextLong();
        long mod = (long)Math.pow(10,6)+7;
        long half = N/2;
        long a = (N-half)%mod;
        long b = (half+1)%mod;
        long c = half%mod;
        long max=(a*b+c)%mod;
        System.out.println(max);
    }
}