import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		long n = Long.parseLong(br.readLine()) - 1;
		br.close();

		BigInteger bi1 = BigInteger.valueOf(n - 1);
		BigInteger bi2 = BigInteger.valueOf(n - 2);
		BigInteger bi3 = BigInteger.valueOf(2);
		BigInteger bi = bi1.multiply(bi2).divide(bi3);

		long ans = (n - 1) / 2;
		if (n % 3 == 0) {
			ans--;
		}
		BigInteger bi4 = BigInteger.valueOf(ans * 3);
		bi = bi.subtract(bi4);
		if (n % 3 == 0) {
			ans++;
			bi = bi.subtract(BigInteger.ONE);
		}
		ans %= 1000000007;
		bi = bi.divide(BigInteger.valueOf(6));
		bi = bi.mod(BigInteger.valueOf(1000000007));
		ans += bi.intValue();
		ans %= 1000000007;
		System.out.println(ans);
	}
}