#include <bits/stdc++.h>
#define rep(i,n) for(int i=(0);i<(n);i++)

using namespace std;

typedef long long ll;

template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }

const ll MOD = 1e9 + 7;

typedef vector<vector<ll>> mat;

void print(mat A){
	rep(i, A.size()){
		rep(j, A[i].size()){
			cout << A[i][j] << (j == A[i].size()-1 ? "\n" : " ");
		}
	}
}

mat mmul(mat A, mat B){
	int n = A.size();
	int l = A[0].size();
	int m = B[0].size();
	mat C(n, vector<ll>(m, 0));
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			for(int k = 0; k < l; k++){
				C[i][j] += A[i][k] * B[k][j];
				C[i][j] %= MOD;
			}
		}
	}

	return C;
}

mat mE(int n){
	mat A(n, vector<ll>(n, 0));
	for(int i = 0; i < n; i++){
		A[i][i] = 1LL;
	}

	return A;
}

mat mpow(mat A, ll x){
	int n = A.size();
	if(x == 0) return mE(n);
	if(x % 2 == 1) return mmul(A, mpow(A, x - 1));

	mat B = mpow(A, x / 2);
	return mmul(B, B);
}

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);

	ll n;
    cin >> n;

   mat x = mat(4, vector<ll>(1, 0));
   x[0][0] = 1; x[1][0] = 0; x[2][0] = 0; x[3][0] = 0;

   mat A = mat(4, vector<ll>(4, 0));
   rep(i, 4) rep(j, 4) A[i][j] = (i == j ? 0 : 1);

   A = mpow(A, n);
   x = mmul(A, x);
   cout << x[0][0] << endl;
}