#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 n*n/4 + n;
	//return ((i+1)*(n-i+1) - 1);
}

long long check(long long &n){
	long long ans = 0;
	for(long long i=1; i<=n; i++){
		ans = max(ans, (i+1)*(n-i+1) - 1);
	}
	return ans;
}

int main(){
	long long n;
	cin >> n;
	long long ans = func(n, 1);
	ans = max(ans, func(n, n));
	for(int i=-4; i<=4; i++){
		if(n/2 + i < 0 || n/2+i > n) continue;
		ans = max(ans, func(n, n/2+i) );
	}
	
	cout << (ans%MOD) << endl;
	//cout << check(n)%MOD << endl;
	return 0;
}