// qdd on Jan 22, 2023

#ifdef qdd
#include <ringo>
#else
#include <bits/stdc++.h>
#define dbg(...)
#define dbgr(x, y)
#endif

using namespace std;

using ll = long long;

#define ALL(x) begin(x), end(x)

template <class T>
istream& operator>>(istream& is, vector<T>& v) {
  for (T& x : v) is >> x;
  return is;
}

template <class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
  bool f = 0;
  for (const T& x : v) (f ? os << ' ' : os) << x, f = 1;
  return os;
}

const int N = 400001;
const int P = 1000007;

ll o[N], e[N];

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  o[0] = 1, e[1] = 1, e[2] = 1;
  for (int i = 3; i < N; i++) {
    o[i] = e[i - 1];
    e[i] = (e[i - 1] + o[i - 1]) % P;
  }
  int n;
  cin >> n;
  cout << (o[n] + e[n]) % P << '\n';
  return 0;
}