#include <iostream>
using namespace std;

int main()
{
	unsigned long long n;
	cin >> n;

	auto h = n / 2;
	h %= 1000007;
	auto l = n / 2 + n % 2;
	l %= 1000007;

	cout << ((h * (l + 1) + l) % 1000007) << endl;

	return 0;
}