#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <numeric>
#include <map>
#include <set>

using namespace std;

#define REP(i,n)	for(int i=0;i<(n);++i)
#define REPS(i,s,t)	for(int i=(s);i<(t);++i)

#define INF 		2000000007
#define MOD			1000000007

#define MAX 		1000005

typedef unsigned int 			uint;
typedef unsigned long long int	ull;
typedef long long int 			ll;

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

	ull DP[5][5];
	DP[1][0]=1;DP[1][1]=0;DP[1][2]=1;DP[1][3]=2;
	DP[2][0]=0;DP[2][1]=1;DP[2][2]=1;DP[2][3]=0;
	DP[3][0]=0;DP[3][1]=0;DP[3][2]=1;DP[3][3]=1;
	
	REPS(i,5,N+1){
		DP[1][4] = (DP[2][3]+DP[3][3])%MOD;
		DP[2][4] = (DP[1][2]+DP[3][2])%MOD;
		DP[3][4] = (DP[1][1]+DP[2][1])%MOD;

		REP(i,3){
			DP[i][1]=DP[i][2];
			DP[i][2]=DP[i][3];
			DP[i][3]=DP[i][4];
		}
	}
	int pos = (N>4) ? 4 : N-1;
	ull ans = ((DP[1][pos]+DP[2][pos])%MOD+DP[3][pos])%MOD;
	cout << ans << endl;

	return 0;
}