import java.io.*;
import java.util.*;


public class Main_yukicoder557 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		final int MOD = 1_000_000_007;

		long n = sc.nextLong();

		if (n == 1) {
			pr.println(2);
		} else if (n % 2 == 0) {
			pr.println(modPow(5, n / 2 - 1, MOD) * 4 % MOD);
		} else {
			pr.println(3 * modPow(5, (n - 1) / 2 - 1, MOD) % MOD * 4 % MOD);
		}
	}

	private static long modPow(long a, long n, int MOD) {
		long loop = n;
		long ret = 1;
		long x = a;
		while (loop > 0) {
			if (loop % 2 == 1) {
				ret = ret * x % MOD;
			}
			x = x * x % MOD;
			loop /= 2;
		}

		return ret;
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}