#include <iostream>
using namespace std;

uint64_t dp[1000010][3];
const int mod = 1000000007;

int main() {
  int n;
  cin >> n;
  dp[1][0] = 1;
  dp[1][1] = dp[1][2] = 0;

  for (int i = 1; i < n; i++) {
    dp[i + 1][0] = dp[i][1] / 2 + dp[i][2];
    dp[i + 1][1] = dp[i][0] * 2;
    dp[i + 1][2] = dp[i][1] / 2;
  }

  int ret = ( dp[n][0] + dp[n][1] + dp[n][2] )%mod;

  cout << ret<< endl;

  return 0;
}