#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<ll>>;
ll mod=1e9+7;

int main() {
    ll N;
    cin>>N;
    N-=4;
    ll R=N%6;
    ll Q=N/6;
    Q%=mod;
    cout<<((3*Q+R)*(Q+1)+(R==0))%mod<<endl;
}