#include <bits/stdc++.h>
using namespace std;
#define mod 1000000007
#define inv2 500000004
#define inv6 166666668
int main() {
    long long n; cin >> n;
    long long s = n-4;
    long long all = ((s+2) % mod) * ((s+1) % mod) % mod * inv2 % mod;
    long long three = s % 3 == 0 ? 1 : 0;
    all = (all + mod - three) % mod;
    long long two = ((s / 2 + 1) % mod + mod - three) % mod;
    all = (all + mod - two * 3 % mod) % mod;
    long long one = all * inv6 % mod;
    cout << (one + two + three) % mod << endl;
    return 0;
}