#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>

using namespace std;

#define MOD 1000007

long long func(long long &n, long long i){
	return ((i+1)*(n-i+1) - 1) % MOD;
}

int main(){
	long long n;
	cin >> n;
	//long long ans = func(n, 1);
	//ans = max(ans, func(n, n));
	//ans = max(ans, func(n, n/2) );
	//ans = max(ans, func(n, n/2+1) );
	cout << (n*n/4 + n)%MOD << endl;
	//cout << ans << endl;
	return 0;
}