import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	final long MOD = 1000000007;

	void run() {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		long[][] mat = { { 1, 1, 0, 0 }, { 0, 1, 1, 2 }, { 0, 1, 0, 0 }, { 0, 1, 0, 1 } };
		long[][] v = { { 0 }, { 1 }, { 0 }, { 0 } };
		mat = pow(mat, N);
		mat = mul(mat, v);
		System.out.println(mat[0][0]);
	}

	long[][] pow(long[][] a, long n) {
		long[][] ret = new long[a.length][a.length];
		for (int i = 0; i < a.length; ++i)
			ret[i][i] = 1;
		for (; n > 0; n >>= 1, a = mul(a, a)) {
			if (n % 2 == 1)
				ret = mul(a, ret);
		}
		return ret;
	}

	long[][] mul(long[][] a, long[][] b) {
		long[][] ret = new long[a.length][b[0].length];
		for (int i = 0; i < a.length; ++i) {
			for (int j = 0; j < b[i].length; ++j) {
				for (int k = 0; k < a[i].length; ++k) {
					ret[i][j] = (ret[i][j] + a[i][k] * b[k][j]) % MOD;
				}
			}
		}
		return ret;
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}