#include <cstdio>
#include <cstdlib>
#include <cstring>

using namespace std;

//namaega184



int main(){
	
	long long n;scanf("%lld",&n);
	printf("%lld\n",((n/2)%1000007*((n+1)/2+1)%1000007+(n+1)/2)%1000007);

	
	
	
	
	
	return 0;
}