#include <iostream>                                                                                                                                                     
long long MOD = (long long) 1e9 + 7;

long long pow(long long a, long long n) {
  long long ret = 1;
  for (; n > 0; n >>= 1, a = a * a % MOD) {
    if (n % 2 == 1) {
      ret = ret * a % MOD;
    }
  }
  return ret;
}

long long inv(long long a) {
  return pow(a, MOD - 2);
}

int main() {
  long N, n1 = 0, n2 = 0, n3 = 0;
  std::cin >> N;
  N -= 4;
  if (N % 3 == 0) n3 = 1;
  n2 = N / 2 + 1 - n3;
  N %= MOD;
  n1 = (N + 2) * (N + 1) % MOD * inv(2) % MOD;
  n1 -= n3 + 3 * n2 % MOD;
  n1 = n1 * inv(6) % MOD;
  if (n1 < 0) n1 += MOD;
  long long ans = (n3 + n2 + n1) % MOD;
  std::cout << ans << std::endl;
}