#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>


using namespace std;


int main() {
	
	long long int n, x,y;
	cin >> n;
	n %= 1000007;
	x = n / 2;
	y = n / 2 + 1;
	long long int ans = 0;
	ans = max(ans, -(x*x) + (x*n) + n);
	ans = max(ans, -(y*y) + (y*n) + n);
	ans %= 1000007;
	cout << ans << endl;

	return 0;

}