#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

typedef vector<ll> vec;
typedef vector<vec> mat;
const ll MOD = 1000000007;
mat mul(mat &A, mat &B){ // A*B
  mat C(A.size(), vec(B[0].size()));
  rep(i,A.size()) rep(k,B.size()){
    rep(j,B[0].size()){
      C[i][j] = (C[i][j]+A[i][k]*B[k][j])%MOD;
    }
  }
  return C;
}
mat pow(mat A, ll n){ // A^n
  mat B(A.size(), vec(A.size()));
  rep(i,A.size()) B[i][i] = 1;
  while(n>0){
    if(n&1) B=mul(B,A);
    A=mul(A,A);
    n>>=1;
  }
  return B;
}

int main(){
  ll N;
  cin >> N;

  mat a = {{1, 1},{1, 0}};
  mat b = pow(a, N);

  cout << (b[0][0] * b[0][1])%MOD << endl;
  
  return 0;
}