import java.util.*;

public class Main {
	
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		long n=sc.nextLong();
		int mod=1000007;
			long x=n/2;
			long ans=(((x%mod)*(n-x))%mod+n%mod)%mod;
			
	    System.out.println(ans);
	}}