import java.util.*;

public class Main {

  public static long MOD = (long)Math.pow(10, 6) + 7;
  public static long MOD2 = 2 * MOD;

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long t = 1;
    long n1 = n % MOD;
    long n2 = n % MOD2;
    if(n % 2 == 0) {
      t = (n2 * n2) % MOD;
      t = (t + n1) % MOD;
    } else {
      t = (n2 * n2 + MOD - 1) % MOD;
      t = (t + n1) % MOD;      
    }
    System.out.println(t);
  }
}